Improvements for the 3D printing process based on an FDM printer

El TFG esta realizado sobre una impresora 3D de la marca Ultimaker. Consta de 3 partes diferentes. La primera es la búsqueda y creación de un sistema de auto calibrado de la base sobre la que se imprime. La segunda analiza los diferentes parámetros que influyen en el proceso de impresión. Por ultimo se analizan los fallos que aparecen al imprimir paredes delgadas en diferentes materiales plásticos, buscando posibles soluciones.Departamento de Química AnalíticaGrado en Ingeniería Mecánic

Peluang kerjaya lepasan politeknik bidang elektronik dan elektrik di sektor perindustrian elektronik di Daerah Batu Pahat

Projek Sarjana ini bertajuk "Pe/uang keljaya /epasan politekni(bidang e/eklronik dan e/eklrik di seklorperinduslrian eleklronik di daerall Balu Pallal ". Secara keseluruhannya, objektifkajian ioi dijalankan untuk melihat pelllang-peluang kerjaya bagi gradllan lepasan politeknik bidang elektronik dan elektrik di sektor perindustrian elek1Tonik di daerah Batu Pahat. Projek Sarjana ini merupakan satu projek yang berbentuk kualitatif di mana responden terdiri daripada Pegawai Sumber Manusia kilang di sektor perindustrian elektTOnik di daerah Batu Pahat yang terpilih. Sepuluh buah kilang yang telah dipilih iaitu kilang SharpRoxy dan SMM di Batu 6, Batu Pahat, kilang Fujitsu di Parit Raja, Batu Pahat , kilang Mitsumi di Bukit Pasir, Batu Pahat, Asahi Electronics (M) Sdn. Bhd, Kawasan Perindustrian Mengkibol, Jalan Kluang, Akari Industries Sdn. Bhd, Jalan Ledang Tg. Laboh Batu Pahat, Alpha Electronics, Jalan Pegawai Batu Pahat, Action ElectTonics Trading Compo ny, Taman Banang Batu Pahat, Nexus Electonics Sdn. Bhd, Taman S. Sulong, Parit Sulong Batu Pahat, Nexquest Sdn. Bhd, Parit Kuari, Parit Raja, Batu Pahat dan Ishi Den Electronics (M) Sdn. Bhd, Kawasan Perindustrian Sri Gading. Data yang diperolehi adalah melalui temubual berstruktur. Dapatan kajian ini menunjukkan bahawa terdapat banyak peluang- peluang kerjaya lepasan politeknik bidang elektronik dan elektrik di sektor perindustrian elek1ronik di daerah Batu Pahat yang boleh diceburi oleh lepasan politeknik bidang elektronik dan elektrik apabila tamat pengajian kelak

Influence of Print Orientation on Surface Roughness in Fused Deposition Modeling (FDM) Processes

In the present paper, we address the influence of print orientation angle on surface roughnessobtained in lateral walls in fused deposition modelling (FDM) processes. A geometrical model isdefined that considers the shape of the filaments after deposition, in order to define a theoreticalroughness profile, for a certain print orientation angle. Different angles were considered between 5¿and 85¿. Simulated arithmetical mean height of the roughness profile, Ra values, were calculated fromthe simulated profiles. The Ra simulated results were compared to the experimental results, whichwere carried out with cylindrical PLA (polylactic acid) samples. The simulated Ra values were similarto the experimental values, except for high angles above 80¿, where experimental roughness decreasedwhile simulated roughness was still high. Low print orientation angles show regular profiles withrounded peaks and sharp values. At a print orientation angle of 85¿, the shape of the profile changeswith respect to lower angles, showing a gap between adjacent peaks. At 90¿, both simulated andexperimental roughness values would be close to zero, because the measurement direction is parallelto the layer orientation. Other roughness parameters were also measured: maximum height ofprofile, Rz, kurtosis, Rku, skewness, Rsk, and mean width of the profile elements, Rsm. At high printorientation angles, Rz decreases, Rku shifts to positive, Rsk slightly increases, and Rsk decreases,showing the change in the shape of the roughness profiles.Postprint (published version

DEVELOPMENT OF A FUSED DEPOSITION MODELLING MACHINE FOR PLASTIC-BASED ADDITIVE MANUFACTURING PURPOSES

In this work, the development of a Fused Deposition Modelling (FDM) machine was successfully carried out and reported. The machine was designed to boost local manufacturing capabilities in Nigeria by promoting the use of additive manufacturing techniques for the production of plastic-based prototypes, functional components and casting patterns. The machine consists of a heater bed, hot-end extruder, machine frame, controller and electrical circuitry and it was designed to have a working envelope with a maximum build volume of 200 x 200 x 200 mm3. The design of each machine component parts was analyzed and the structural capacity was assessed using finite element analysis (FEA) tool in Autodesk Inventor and COMSOL Multi-physics applications. The simulation result showed that maximum stress of 3.669 MPa was attained in one of the machine stands when a component aggregate load of 301.29 N was exerted on the frame structure. The machine component with a maximum resultant displacement of 0.04 mm was also observed while the minimum factor of safety was 12.5. This result shows that the design of the machine is satisfactory for its development since the yield strengths of the selected materials for the individual components were not surpassed by the stresses obtained from the FE analysis. Upon the machine development, it was able to produce prototypes of some vehicle logos which confirms its capability to perform the intention of its vehicle logos which confirms its capability to perform the intention of its development

Medical Applications of Materials Manufactured by the AM Process

The use of 3D printing for manufacturing parts has made it possible to produce components with complex geometries according to drawings made on the computer. 3D printing offers many advantages in the manufacture of polymers and composites, including high precision, low cost, and custom geometry. Several techniques are used in 3D printing, the ones discussed in this monograph are the main ones for polymers. These are: fused deposition modeling (FDM), Injection 3D printing (3DP), Stereolithography (SLA), and finally selective laser sintering (SLS). The 3D printing technique has several applications, however, the focus in this project is to analyze the various medical applications and the main advantages and disadvantages associated with it. Some of the main applications of this type of technology that will be described throughout the project are: - Bioprinting of tissues and organs - Customized Implants and Protheses - Anatomical Models for Surgical Application - Pharmaceutical Application The main objective will be to analyze, for these procedures, what are the advantages associated with the use of 3D technology and what are the goals for the future in this field. In addition, it will be important to mention the advantages and disadvantages of this combination (3D printing and medicine) in a more general overview, identifying numerous advantages but also potential risks that need to be taken into account. In order to deepen the analysis further, two practical cases will be studied, ensuring their contextualization for the project and also a verification of the improvements and processes facilitated by the application of 3D technology in these fields.IncomingObjectius de Desenvolupament Sostenible::9 - Indústria, Innovació i Infraestructur

Medical Applications of Materials Manufactured by the AM Process

The use of 3D printing for manufacturing parts has made it possible to produce components with complex geometries according to drawings made on the computer. 3D printing offers many advantages in the manufacture of polymers and composites, including high precision, low cost, and custom geometry. Several techniques are used in 3D printing, the ones discussed in this monograph are the main ones for polymers. These are: fused deposition modeling (FDM), Injection 3D printing (3DP), Stereolithography (SLA), and finally selective laser sintering (SLS). The 3D printing technique has several applications, however, the focus in this project is to analyze the various medical applications and the main advantages and disadvantages associated with it. Some of the main applications of this type of technology that will be described throughout the project are: - Bioprinting of tissues and organs - Customized Implants and Protheses - Anatomical Models for Surgical Application - Pharmaceutical Application The main objective will be to analyze, for these procedures, what are the advantages associated with the use of 3D technology and what are the goals for the future in this field. In addition, it will be important to mention the advantages and disadvantages of this combination (3D printing and medicine) in a more general overview, identifying numerous advantages but also potential risks that need to be taken into account. In order to deepen the analysis further, two practical cases will be studied, ensuring their contextualization for the project and also a verification of the improvements and processes facilitated by the application of 3D technology in these fields

Extrusion of thermoplastic elastomer filaments for the design of multi-polymer structures by 3D printing

El objetivo del proyecto es crear un objeto impreso en 3D mediante FDM (Modelado por Deposición Fundida) con una parte suave y una parte dura combinando sus propiedades y el diseño del objeto. Diseñar un filamento de material blando con buena compatibilidad con un termoplástico, poli (ácido láctico) (PLA) usando diferentes (co)polímeros comerciales para el proceso de extrusión e impresión y por último elegir un método para evaluar la adhesión del filamento diseñado con el filamento de PLA. En este informe se estudia la extrusión y la posibilidad de impresión de diferentes TPE (elastómeros termoplásticos). Primero, se incluye un fondo bibliográfico que presenta el estudio. En segundo lugar, se recopila una lista de los materiales y métodos utilizados para este estudio. Y finalmente, se presentan los resultados obtenidos en este estudio, así como las perspectivas de conclusión.Departamento de Ingeniería Química y Tecnología del Medio AmbienteGrado en Ingeniería Químic

The synergic effects of FDM 3D printing parameters on mechanical behaviors of bronze poly lactic acid composites

In this paper, the influence of layer thickness (LT), infill percentage (IP), and extruder temperature (ET) on the maximum failure load, thickness, and build time of bronze polylactic acid (Br-PLA) composites 3D printed by the fused deposition modeling (FDM) was investigated via an optimization method. PLA is a thermoplastic aliphatic polyester obtained from renewable sources, such as fermented plant starch, especially made by corn starch. The design of experiment (DOE) approach was used for optimization parameters, and 3D printings were optimized according to the applied statistical analyses to reach the best features. The maximum value of failure load and minimum value of the build time were considered as optimization criteria. Analysis of variance results identified the layer thickness as the main controlled variable for all responses. Optimum solutions were examined by experimental preparation to assess the efficiency of the optimization method. There was a superb compromise among experimental outcomes and predictions of the response surface method, confirming the reliability of predictive models. The optimum setting for fulfilling the first criterion could result in a sample with more than 1021 N maximum failure load. Finally, a comparison of maximum failure from PLA with Br-PLA was studied