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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.

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In metabolic diseases such as phenylketonuria (a rare disease), a very important way to keep the patient healthy is the administration of amino acid substitutes. This dispenser was designed because in other places (except home) for patients, it is very difficult to take the substitute powder due to the custom weight, which depends on the body weight. We designed and made on a 3D printer a graduated dosing device (12 g) which can be used very easily and has all the elements to be transported. In this way, the necessary dose of amino acid substitutes can be administered to patients with phenylketonuria, including infants aged 6 months–1 year, at the kindergarten or any other places with the absence of a food scale. This dispenser is very easy to carry and very useful to patients.

This paper presents testing mode, determinating and validating the mathematical equation an antimony pH sensor. The introduction offers an incursion on the mine water and a definition of the pH concept, a brief history of it and continues with a short presentation of the elements which can make a possible variant of pH measurement, more precise the variant which use pH electrode/pH sensor. In the content of the paper is exposed a theoretical synthesis of the way of testing and validation of pH electrodes/pH sensors, which makes the transition to the actual testing of the studied pH sensor. The elements used for test and also the sensor response are viewed in photographs and graphics, which helps the reader to understand the practical part. Further, in paper, are presented short theoretical considerations followed by the dependence of electrical potential sensor analysis in relation with the change in pH solutions in which it was immersed. Conclusively, the most important conclusions are accentuated after the analysis, continued with some future research directions. Conclusions highlight the paper presented results, results that are seen as an opportunity for future studies.