Este estudo teve por objetivo avaliar, in vitro, a influência do material de confecção das matrizes, traçando um perfil da conversão monomérica de um compósito micro-híbrido, além de avaliar qual dos materiais testados mais se assemelha a uma matriz de dentina. A avaliação foi feita através da análise do grau de conversão (GC). Foram confeccionadas 3 matrizes bipartidas, sendo estas de teflon negro, tefon branco e aço inoxidável, ambas com 10mm de diâmetro e 2 mm de profundidade. Para o grupo controle foi utilizado um incisivo central bovino, o qual teve sua face vestibular aplainada em uma lixadeira sob refrigeração constante, com o auxílio de uma lixa de carbeto de silício, número 800. Após, este dente foi preparado com uma broca diamantada número 2294 (KG Sorensen) em alta rotação, própria para a preparação de cavidades padronizadas para ensaios de laboratório, apresentando um limitador de penetração. Em seguida, com um motor de baixa rotação foi realizado o acabamento das paredes, obtendo-se uma cavidade de 2,0 mm de profundidade por 9,0 mm de diâmetro. Pela palatina desse dente, com uma broca carbide cilíndrica de numeração 2056 (KG Sorensen), fez-se uma penetração até se obter uma parede de dentina extremamente fina, porém sem que esta fosse rompida. Assim, com uma agulha, fez-se uma pequena perfuração no centro dessa dentina para que este instrumental servisse como um pino para remoção do corpo de prova de dentro da matriz de dente. Os corpos de prova (CP) foram obtidos a partir da inserção do compósito no interior da perfuração das matrizes em um único incremento e cobertos na superfície externa com uma matriz de poliéster mais uma lamínula de vidro. Os CP foram fotopolimerizados por 40 s pela fonte de luz halógena Optilux 501 (Demetron), com 500 mW/cm. Imediatamente após a polimerização, os corpos de prova eram submetidos no topo e na base para a análise de espectrometria no infravermelho para a determinação da profundidade de polimerização, pela técnica do filme vazado para o compósito não polimerizado e pela técnica da pastilha de brometo de potássio (KBr) para o compósito polimerizado. Foram confeccionados 5 CP de cada grupo. Em cada grupo, o compósito da base e do topo das amostras foi moído até se obter de 1,5 a 2,0 mg de pó e misturado com 70 mg de KBr, para obtenção da pastilha de KBr. Foi feita a análise de espectrofotometria no infravermelho por Transformada de Fourier (FTIR). As absorções selecionadas para o cálculo foram 1610 cm-1 e 1637 cm-1, os picos dos espectros das ligações dos carbonos aromáticos e alifáticos, respectivamente. Os dados obtidos foram tratados estatisticamente. Os grupos Gr1B, Gr2B, Gr3B e Gr4B representam, respectivamente, as bases dos CP confeccionados pelas matrizes de DB, TN, TB e AI. Já os Gr1T, Gr2T, Gr3T e Gr4T representam os topos. Médias (%) e DP: Gr1T (46,461,99), Gr2T (39,864,51), Gr3T (44,053,44) e Gr4T (38,045,08). Gr1B (40,441,49), Gr2B (36,153,81), Gr3B (40,093,18) e Gr4B (35,593,35). Em posse dos resultados, pôde-se concluir que os grupos do teflon negro, teflon branco e aço inoxidável não apresentaram diferenças entre o grau de conversão do topo e da base, enquanto que o grupo da dentina apresentou maior conversão do topo. Comparando as matrizes entre elas, pôde-se perceber que no topo, o GC do dente bovino é maior que o GC do aço inoxidável e do que o de teflon negro, o GC do teflon branco é maior que o GC do aço inoxidável e do que o de teflon negro. Já o topo dos grupos de dente bovino e teflon banco foram semelhantes. Nas bases dos CPs, não houve diferença significativa entre os grupos testados. De acordo com os resultados obtidos no experimento, pôde-se concluir que nos grupos do teflon negro, teflon branco e aço inoxidável não houve diferença entre 0 e 2 mm, ou seja, topo e base, o que mostra que o material de confecção da matriz não influênciou o grau de conversão do compósito. Já para o grupo da matriz de dentina, o topo apresentou valor de conversão monomérica maior, mostrando que, neste caso, o material da matriz interferiu no grau de conversão. Pode-se perceber também que existe uma tendência da matriz de teflon branco se assemelhar mais a matriz de dentina, pois foi o único grupo que apresentou semelhança nos valores de conversão monomérica no topo das amostras. Porém analisando a base das amostras, percebe-se que todos os grupos se comportaram de forma semelhante, obtendo valores do grau de conversão sem diferença significante. / This study was undertaken in order to determine, in vitro, the influence of mould material by the degree of conversion in a composite, and assess which of the materials tested was more akin to an array of dentin. The assessment was made by examining the degree of conversion (DC). Three bipartite moulds were made of black Teflon, white Teflon and stainless steel. All of them had 10 mm of diameter and 2 mm of deep. To the control group it was used a bovine central incisor, which had its buccal face leveled off in a sander under refrigeration with help of sandpaper 800. After that, this tooth was prepared in high speed with a diamond bur 2294 (KG Sorensen). This bur is proper for preparing standardized cavities for laboratories tests, and has a flat end with stop. A cavity of 2 mm of deep for 9 mm of diameter was obtained by a low speed that made the walls finished. With a cylindrical carbide bur 2056 (KG Sorensen), through the tooth lingual, a penetration was made until an extremely thin wall of dentin was obtained. Thus, with a needle, a little perforation was made in the center of this dentin. The specimens were made dispensed the restorative material on a single increment. A strip of cellulose was placed on top and a glass slab was pressed on the top. The material was cured during 40 seconds by halogen light, Optilux 501 (Demetron), with 500 mW/cm. Immediately, after cured, the specimens were submitted, on the top and on the bottom, to analyze their degree of conversion by FTIR. For the uncured composite was used the technique of the film leaked and for the cured composite, the technique of the potassium bromide tablet (KBr). Five specimens of each group had been confectioned. In each group, the bottom and top composite of the samples was worn out until if getting of 1,5 the 2,0 mg of dust and mixed with 70 mg of KBr, for attainment of the tablet of KBr. The analysis of FTIR was made. The absorptions selected for the calculation had been 1610 cm-1 and 1637 cm-1, the peaks of the specters of the linkings of aromatical and alifatic carbons, respectively. The data had been treated statistical. It could be concluded that the groups of black Teflon, white Teflon and stainless steel had not presented differences between the degree of conversion of the top and the bottom, whereas the group of the dentin presented greater conversion of the top. Comparing the moulds between them, it could be noticed that in the top, the DC of the bovine tooth is greater that the DC of the stainless steel and black Teflon, the DC of white Teflon is greater that the DC of the stainless steel and black Teflon. The top of the groups of bovine tooth and black teflon been similar. In the bottoms of the specimens, it did not have significant difference between the tested groups. In accordance with the results gotten in the experiment, could be concluded that in the groups of black Teflon, white Teflon and stainless steel it did not have difference between 0 and 2 mm, that is, top and bottom, its means that the material of mould confection did not influence the degree of conversion of the composite. Already for the group of the dentin, the top presented value of bigger conversion, showing that, in this in case that, the material of the matrix intervened with the DC. It can also be perceived that a trend of the white Teflon mould to resemble more the dentin mould, therefore was the only group that presented similarity in the values of DC in the top of the samples. However analyzing the bottom of the samples, all the groups had values of the degree of conversion without significant difference.

O permanente contato das vedações externas dos edifícios com os materiais integrantes das vedações externas dos edifícios (fachadas e telhados) com os agentes de degradação provocam o surgimento de manchas, que normalmente estão associadas à deposição de poluentes e a proliferação de microorganismos. Para inibir o surgimento dessas manchas existem, atualmente, diversos métodos disponíveis, sendo que nenhum tem se mostrado efetivo. Esta tese de doutorado, com base em um extenso programa laboratorial - com o uso de métodos como MEV, FTIR, ângulo de contato, crescimento acelerado de microrganismos, atividade fotocatalítica, entre outros-, criou um novo método, destinado aos materiais de construção silicosos e porosos, que se baseia na modificação de suas propriedades superficiais, por meio da sobreposição de uma camada hidrofóbica por uma hidrofílica. Para se obter essa disposição superficial, utilizou-se um hidrofugante à de octil-silicone, que apresenta elevada repelência à água e maior durabilidade, e um semicondutor à base de dióxido de titânio, que apresenta atividade fotocatalítica quando incidido por radiação ultravioleta. Como resultado, o método proposto (denominado na tese por WR+TiO2-sequencial) apresenta, comprovadamente, os seguintes benefícios: (i) redução de manchas causadas pela adesão de partículas com características apolares, similares às partículas de poluição dos grandes centros urbanos; (ii) limpeza espontânea de certos tipos de manchas, decorrentes dos processos fotocatalíticos que promovem a oxidação/redução de matéria orgânica; (iii) inibição do crescimento de microrganismo em escala laboratorial; (iv) redução da absorção total de água e, principalmente, da cinética do ganho de massa. Por isso, edificações cujas vedações externas venham a ser tratadas com o método aqui proposto são, potencialmente, células ativas para a sustentabilidade do ambiente construído, pois: reduzem o consumo de energia, reduz os custos de manutenção e contribuem para despoluição da atmosfera urbana. / Building roofs and façades usually show blackening surfaces after few years in large cities. On porous and silicious materials those soiling is caused by particles pollution depositions and mould growth, and the available methods available to prevent this phenomenum do not have a good performance along its service life. This thesis, based on an intensive laboratory research with many test technics as SEM, FTIR, contact angle, accelerated mould growth, and photocatalytical activity, create a new method to prevent soiling on porous and silicous building materials. This method modify the materials surface properties, making the outer surface layers with nano-actived titanium dioxide particles, which has photocatalitycal activity under UV radiation, and below it a hydrophobic layer, composed by octyl-silicones. The main results in laboratory scale experiments obtained by this new method (so-called in this thesis by WR+TiO2-sequencial) are: (i) stainings reductions caused by apolar agent, (ii) self-cleaning properties for some stain and after UV radiation exposition, (iii) mould growth resistance, and (iv) water absorption reduction. As a consequences, building envelopes trated with the new method is supposed to contribute to built and environment sustantability, because: can reduce the energy consumption, reduce de maintenance costs e has a de-pollution properties.

A adaptação marginal e a rugosidade de superfície são parâmetros fundamentais para o sucesso clinico e longevidade das coroas metalocerâmicas. O primeiro permite o selamento das bordas do preparo, prevenindo contra problemas relacionados a exposição do preparo aos fluidos orais e a placa bacteriana e o segundo, remete ao auxilio de uma boa adaptação a fatores mecânicos e biológicos importantes a qualidade da restauração final. Visto que ambos os aspectos são diretamente relacionados a temperatura em que as ligas são submetidas, o objetivo deste trabalho foi avaliar o desajuste marginal, por meio de microscopia óptica, e rugosidade de superfície, por meio de microscopia confocal, de copings metálicos obtidos com as ligas metalicas de Ni-Cr [Verabond II e experimental (SR)] e Co-Cr (Keragen) injetadas no molde de revestimento a duas diferentes temperaturas de estufagem (900°C e 700°C), de forma a avaliar se a redução da temperatura de estufagem possa causar o melhoramento do resultado das fundições, minimizando os efeitos das altas temperaturas. As leituras foram realizadas em copings confeccionados a partir da fundição de casquetes de munhão calcináveis. Cada coping foi cimentado a uma matriz (munhão) por meio de um padronizador da pressão de assentamento e levado aos respectivos microscópios para leitura de desajuste marginal e rugosidade de superfície. Para a avaliação do desajuste marginal foi calculada a media das distancias da borda da restauração a borda do preparo a partir de um ponto inicial aleatório selecionado sobre a margem cervical do coping. Duas leituras eram realizadas a cada &frac14; de volta, totalizando 8 leituras por coping. Para os dados obtidos, que tiveram distribuição não normal, foi utilizado o teste não paramétrico de Kruskal Wallis e foi observado que a liga VB apresentou menor desajuste marginal (56,92&micro;m) quando comparado a liga Keragen (66,75 &micro;m) com p<0,05 e a liga SR apresentou resultado intermediário (49,87&micro;m), sem diferença estatística entre as demais. Para comparação das temperaturas foi utilizado o teste Mann-Whitney e a fundição a 700 °C resultou em melhor adaptação marginal que a 900 °C (50,75 &micro;m e 66,75 &micro;m, respectivamente) com p=0,045. Para a avaliação da rugosidade foi selecionada uma área do coping distante 100 m da borda cervical da peca e realizada a leitura. Os dados de rugosidade de superfície seguiram distribuição normal, sendo utilizado um teste paramétrico (ANOVA), seguindo pelo teste de Bonferroni. Ao se compararem as Ligas, SR apresentou menor rugosidade que Keragen (p=0,002) e que Vera Bond (p=0,001); ao se compararem as temperaturas a fundição a 700 °C resultou em menor rugosidade que a 900 °C (p=0,045). O que se concluiu com a presente metodologia apresentada foi que o comportamento das ligas as diferentes temperaturas varia de acordo com a sua composição tanto em relação a superfície quanto a adaptação marginal e que a fundição a 700 °C proporcionou obtenção dos melhores resultados em ambas as variáveis, sendo possível a otimização da superfície da peca fundida sem o comprometimento da adaptação marginal por meio da redução da temperatura de injeção da liga no molde, favorecendo o resultado final das restaurações. / A proper marginal fit and surface roughness are fundamental aspects for the clinical success of metal-ceramic crowns. The first parameter allows to preserve the margins adaptation accuracy of the restaurations, thus preventing issues related to an improper exposition of the dental tissues into the oral fluids and biofilm. The second parameter is related to mechanical and biological important aspects for the restoration quality and is also able to optimize the piece final adaptation. Both parameters are associated to temperature levels and the understanding of their behavior is convenient for the improvement of the Fixed Prostheses, therefore the aim of this study was to mensure the maginal gap by using the optical microscopy and evaluate the surface roughness by confocal microscopy of metallic copings fused with Nickel-Chromium alloys [Verabond II e experimental (SR)] and Cobalt- Chromium (Keragen) under two distinct mold temperature for the alloy injection: 700°C and 900°C. Performing those analysis represents a way to find out if the temperature reduction of the mold can be convenient to increase the quality of the casting patterns`s surface without affect the marginal fidelity, thus minimizing the overheat casting problems. The mensurements were performed in copings fused from resin cylinders for casting and each one, after fused, was cimented in a abutment cylinder analogue with standardized pression and placed under the respective microscopes for marginal fit and surface analyses. For the marginal fit mensurement were selected two equidistant points in a metal coping that representing &frac14; turn on the measurement device, in a total of 8 measurements for coping in each step that results in a misfit average. Once it was found a non-normal distribution, the non-parametric Kruskal Wallis test was performed for the data and was observed that the allow VBII conferred lower values of marginal fit (56,92 &micro;m) when compared to Keragen alloy (66,75 &micro;m), p<0,05, and SR conferred average values between the others (49,87 &micro;m),with no statistic difference. In the comparison between the mold temperatures the Mann-Whitney test was implemented and the temperature at 700°C reveled better results of marginal fit than the 900 °C temperature (50,75 &micro;m e 66,75 &micro;m, respectively) with p=0,045.For the surface analysis was selected an anatomic reference line in each coping and was set up a distance of 100 &micro;m from this point to make the quantification. For the surface roughness data, with normal distribution, comparisons were performed using a parametric test for independent data (ANOVA), followed by Bonferroni test. The level of significance was set at 5%. At the comparison of alloys, the SR granted lower values of roughness in its patterns than Keragen (p=0.002) and Verabond II (p=0,001). Comparing the temperatures, the values of roughness of the patterns fused under 700° were lower than those fused under 900° (p=0,045). There was no significant difference for interaction between alloy X temperature (p=0,280). The conclusion of the present study was that the behavior of the alloys regarding the marginal fit and surface roughness vary depending of its composition and the Mold temperature and Pieces injected at 700°C in the mold conferred better results in both parameters, therefore being possible to optimize the fixed photesis casting patterns surfaces without marginal fit commitment by reducing the mold temperature for the alloy injection, thus Contributing to the quality of the metal ceramic restorations.

O fluxante é uma escória sintética que influencia na qualidade superficial do aço e na estabilidade do processo de lingotamento contínuo. Este produto é aplicado diretamente sobre o aço líquido na região do molde de cobre refrigerado a água e atua diretamente no resfriamento primário do aço. O fluxante tem as propriedades físico-químicas adaptadas para cada tipo de aço e também para as condições de lingotamento. Na superfície do aço líquido, o fluxante funde e forma uma poça líquida, atuando como isolante térmico, protegendo o aço da reoxidação e absorvendo inclusões principalmente de Al2O3. A poça líquida escoa, lubrificando e controlando a transferência de calor na interface entre o molde e a pele de aço em solidificação. O problema de qualidade superficial do aço, quando relacionado ao fluxante, se resume a alarmes de colamento, trincas de quina, marcas de oscilação profundas e trincas longitudinais, sendo este último um problema particular do aço médio carbono. Neste trabalho, foram analisados diferentes fluxantes baseados inicialmente no fluxante comercial aplicado no lingotamento contínuo de placas de aço médio carbono. Todos os fluxantes foram desenvolvidos com composições químicas similares. O objetivo foi avaliar o impacto da substituição de fontes de matérias-primas em diferentes composições de modo a avaliar as propriedades físico-químicas com base no fluxante comercial de referência. Como resultado, de todas as propriedades físico-químicas, foi a temperatura de cristalização que sofreu a alteração mais significativa. / The mould flux is a synthetic slag which influences the quality of steel surface and also the stability of the continuous casting process. This product is applied in direct contact with the surface of liquid steel in the region of the water cooled cupper mold and acts directly on the primary cooling of steel. The mould flux has the physical and chemical properties adapted for each type of steel as weel as casting conditions. On the surface of liquid steel, the mould flux melts and forms the liquid pool, working as an insulator, protecting the steel against reoxidation and also absorbing mainly Al2O3 inclusions. The liquid pool flows, lubricating and controlling the heat transfer in the interface between the mold and the steel shell during solidification. The surface quality issues when related with mould flux can cause alarms of breakout, corner cracks, deep oscillation marks, longitudinal cracks that is a particular problem in medium carbon steel grade. In this study, different mould fluxes were investigated and compared to a commercial mould flux applied to the continuous casting of slabs in the medium carbon steel grade. All mould fluxes were developed with a similar chemical composition. The main goal was to evaluate the impact of changing raw material sources on the physicochemical properties of the different mould fluxes and the results was compared with a commercial standard mould flux. As result, variations in the crystallization temperatures were observed more than others properties analyzed.

Philosophiae Doctor - PhD / Pesticides are designed to control or eliminate pests such as insects, rodents, weeds, bacteria, and fungi. They are used at a global scale for agricultural produce. Although pesticides play a significant role in increasing food production and eliminating diseases, exposure to pesticides may be harmful to non-target organisms. As a result concern over safety and esistance to pesticides has increased and there is pressure to reduce use and search for more environmentally and toxicologically safe and efficacious pesticides. Most pesticides currently in use are synthetic; therefore an alternative to synthetic pesticides is the use of naturally occurring products/ botanicals with pesticidal properties. Two plants indigenous to South African with pesticidal properties were chosen for this study. Dicerothamnus rhinocerotis (D. rhinocerotis) and Galenia africana (G. africana) have potential antifungal properties thus, may have potential use on agricultural produce as fungicides. Galenia africana and D. rhinocerotis extracts inhibit growth of B. cinerea (a fungal pathogen) at concentrations greater than 31.25 mg/ml and 125mg/ml respectively. A major consideration in approving pesticides for use is whether they pose an unreasonable risk to humans and to the environment. Toxicity studies are required to determine the safety of the plant extracts. The purpose of this study was to evaluate potential toxicity of ethanol extracts of D. rhinocerotis and G. africana, which is important when designing practices to reduce or eliminate excess exposure to them. Natural plant products with pesticidal properties could provide an alternative to synthetic pesticides and may thus effectively reduce resistance levels. This first objective of this study was to assess the cytotoxicity of D. rhinocerotis and G. africana on human cell cultures. Human whole blood and the human breast adenocarcinoma cell line (MCF-7) were treated with varying concentrations of the plant extracts and cytotoxicity determined. Cytotoxicity was measured using several biomarkers. Inhibiotory concentration for a 50% effect (IC50) and no observable effect level (NOEL) values were obtained for D. rhinocerotis and G. africana. The results showed that extracts of D. rhinocerotis and G. africana had cytotoxic effects on the cell cultures. The second objective of this study was to determine the ecotoxicity of D. rhinocerotis and G. africana. A series of acute toxicity tests, with effective concentration for a 50% effect (EC50) and lethal concentration for a 50% effect (LC50) as biomarkers, were conducted to estimate the potential environmental effect of the two plants. The tests were carried out using Vibrio fischeri, Selenastrum capricornutum, Daphnia pulex, and Poecilia reticulata as bioindicators. Results obtained showed that G. africana had higher toxicity units than D. rhinocerotis, thus showing that G. africana is more toxic to the aquatic species used as compared to D. rhinocerotis. The third objective of this study was to investigate the immunomodulatory effects of the two plant extracts. This was achieved by using mouse spleen cell cultures. Exposure of pesticides to the immune system may result in alteration of the normal immune functions. The cytokines IFN-γ and IL-4 were used as biomarkers to determine the T-cell activity of the immune system when exposed to the two botanical products. The results obtained showed that both D. rhinocerotis and G. africana decrease of the cytokines interferongamma (IFN-γ) and interleukin-4 (IL-4), thus may have immunotoxic effects. The fourth objective was to investigate the hepatotoxicity of the two plant extracts. Injury to the liver was investigated using a range of clinical biochemical tests that monitor liver enzyme activity and metabolic activity. Primary liver cell cultures were exposed to the plant products in question, after which the biochemical tests were carried out. The enzymes that were monitored were alanine aminotrasferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP) and lactate dehydrogenase (LDH). The results obtained showed that both of D. rhinocerotis and G. africana may have effects on the liver, as shown by the increased levels of enzymes released from cells upon exposure to plant extracts. The final objective of this study was to investigate the effect of the two plants on the male reproductive system. Injury to the male reproductive system was investigated using testicular cell cultures. Primary cell cultures were stimulated with luteinizing-hormone (LH) and exposed to the plant extracts. LH results in the production of testosterone, thus testosterone was used as a biomarker for assessing reproductive toxicity. The results obtained showed that both of D. rhinocerotis and G. africana have effects on the male reproductive system, as shown by the decreased testosterone secretion. Botanicals provide a simple, inexpensive and environmentally friendly (non-pollution and lesser toxicological concerns) alternative for pest control. However, motivation for the commercial use of botanicals as pesticides requires validating the efficacy of the plant as a pesticide, and also assessing its effects on human health and the environment. An important component of this evaluation involves toxicity studies, which enables cautions of dangerous practices and toxic effects of the plants to be issued. / South Africa

The diploma thesis deals with the modification and inoculation of cast iron with spheroidal graphite, the influence of the chemical composition on the shape and size of the graphite nodules and ferrite/perlite ratio in the structure. The aim of the practical part was to determine the effect of inoculant containing bismuth (SMW 605) on microstructure and mechanical properties of ferritic ductile cast iron GJS 400-15. The dissolving time of mold inoculant was further investigated. The samples were subjected to a tensile test, Charpy impact test, hardness test and graphite morphology and ferrite/perlite examination using standard ČSN EN ISO 945-1.

This project, elaborated within the Engineer Diploma studies of the 2307 branch, presents a design of a production technology of a mobile phone plastic cover. A technology of injection of plastics on the Demag Ergotech 80 injection machine has been designed on he basis of belles-lettres of injection of plastics and calculation. A shedder has been used to eject the parts. Material ABS NOVODUR P2H – AT (manufacturer: Bayer) has been used to produce the part. The mould is designed with the axial injection technology (perpendicularly to the dividing plane), closing force is 800 kN.

The goal of the diploma thesis is to verify the possibilities of obtaining the casting of the femur component of the customized knee replacement using the technology of Rapid Prototyping and investment casting. To get the wax pattern it is used the method of fabrication the silicon rubber mould. Its optimalization from the wax pattern quality, economy of production and cooling speed aspects is important parameter at repeated production of the wax patterns.

This Diploma contains theme of injection of plastics. The theoretical section is focused on polymeric materials, their dividing and characteristics. From technologies for processing plastic is chosen injection of plastic, suitable for production technology of plastic switch frame. After that follows design of injection mould including calculation and designing drawing underlaid technical economic evaluation.

This master´s thesis deals with the complex manufacturing technology of plastic injection moulding. Literary work summarises knowledge of thermoplastic injection, thermoplastic bonding and choosing the right material for the given product. The reaction between the product and chemical substances plays a key role when choosing the right material. Therefore polypropylene is chosen for its high chemical and mechanical resistance. The given material is defined by technological data and technological process is proposed. A single-purpose injection mould for an existing injection machine is proposed for manufacturing the plastic mixing body tube corpus.