No abstract

Additive manufacturing (AM), also known as 3D printing is a manufacturing technology that takes the information from a computer-aided design (CAD) and builds parts in a layer by-layer style. Further to the extensive research on 3D printing of polymers and metals, ceramics have attracted the increasing attention of researchers, in sectors such as aerospace, electrical, chemical or medical. Complex shapes printing with porous structures, which are required in the medical area for prostheses, is difficult with most of the traditional manufacturing processes.However, additive manufacturing processes can achieve such geometries. Specifically, the direct ink writing (DIW) process is one of the most promising and inexpensive techniques for shaping free-form ceramic components. In this process, the material is extruded through a syringe and then deposited on a printing bed. In the present paper the redesign of an extrusion

No abstract

Today, the introduction of ceramic materials in the medical eld is becoming a vital necessity because of its stable physicochemical characteristics, high biocompatibility, and good osteoconductivity. On the other hand, machining of ceramic components is di cult, owing to their extreme hardness and brittleness. Additive Manufacturing (AM) technologies are an appropriate alternative to obtain the complex shapes of implants, which can have porous structures. Thus, since the development of 3D printing, Direct Ink Writing (DIW) is one of the most promising and inexpensive techniques for shaping free-form ceramic medical components such as prostheses or dental implants from liquids or pastes. However, the assurance of performance criteria of the extrusion system for simultaneous usage becomes the major challenge for most Direct Ink Writing (DIW) platforms, for instance for printing large parts, for multi-material printing, to decrease printing time, and to increase e ciency in terms of motor usage and weight of the extruders. To address the current de ciencies, a new extrusion system is redesigned for a 3D printing machine for ceramics that is compatible with different low-cost, open-source 3D printers. The proposed extrusion model enables printing with a loader with different syringes simultaneously, without stopping the operational process while switching the syringe. Pugh concept analysis was used to select the optimum design shape. After that, the 3D CAD environment was used to combine the strength of Pugh's method and the design space. This brings a new concept into the mechanical design eld for 3D printers, which is in line with the technological trends prevalent in industry.

Today, the introduction of ceramic materials in the medical field is becoming a vital necessity because of its stable physicochemical characteristics, high biocompatibility, and good osteoconductivity. On the other hand, machining of ceramic components is difficult, owing to their extreme hardness and brittleness. Additive Manufacturing (AM) technologies are an appropriate alternative to obtain the complex shapes of implants, which can have porous structures. Thus, since the development of 3D printing, Direct Ink Writing (DIW) is one of the most promising and inexpensive techniques for shaping free-form ceramic medical components such as prostheses or dental implants from liquids or pastes. However, the assurance of performance criteria of the extrusion system for simultaneous usage becomes the major challenge for most Direct Ink Writing (DIW) platforms, for instance for printing large parts, for multi-material printing, to decrease printing time, and to increase efficiency in terms of motor usage and weight of the extruders. To address the current deficiencies, a new extrusion system is redesigned for a 3D printing machine for ceramics that is compatible with different low-cost, open-source 3D printers. The proposed extrusion model enables printing with a loader with different syringes simultaneously, without stopping the operational process while switching the syringe. Pugh concept analysis was used to select the optimum design shape. After that, the 3D CAD environment was used to combine the strength of Pugh’s method and the design space. This brings a new concept into the mechanical design field for 3D printers, which is in line with the technological trends prevalent in industry.