Akademik Veri Yönetim Sistemi
6. INTERNATIONAL SCIENCES AND INNOVATION CONGRESS, Ankara, Türkiye, 25 Şubat - 26 Mart 2023, ss.216-222
Fused deposition modeling (FDM), which is one of the additive manufacturing methods, is currently widely used. Although it is possible to produce various parts with the geometric freedom provided by the FDM method, its strength remains limited due to inherited problems such as high porosity, low interlayer strength, etc. Various methods are used in the literature, such as applying vibration in the print head and printing under force to reduce porosity. In order to remove the porous areas caused by the moisture remaining in the filament and the printing method, printing methods under a vacuum are also tried. However, only partial improvements have been achieved due to the fact that the method of printing under a vacuum has been tried at relatively low vacuum values. Within the scope of this study, a vacuum cabinet has been designed that will enable reaching very low pressure (high vacuum) values , and an FDM printer can be placed in it. In the design of the vacuum cabinet, first of all, attention was paid to the ability of the cabinet to withstand high vacuum values mechanically and to have a volume in which the three-dimensional printer and its attachments could fit. In addition to these, considering that the heat transfer will decrease considerably with convection under vacuum, it has been realized that the circuit elements that will be affected by the heat are taken out of the cabinet. Stepper motors, which cannot be taken out but can still be badly affected by heat, are cooled by open circuit water cooling. Similarly, liquid cooling is used in the print head in order not to cause problems such as the expansion of the filament in the print head and thus to cause clogging.