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ATAKÖK, GÜRCAN

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Now showing 1 - 4 of 4
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    Experimental investigation of plastic injection molding: Assessment of the effects of cavity pressure and mold temperature on the quality of the final products
    (ELSEVIER SCI LTD, 2009) ATAKÖK, GÜRCAN; Kurt, Mustafa; Kamber, O. Saban; Kaynak, Yusuf; Atakok, Gurcan; Girit, Oguz
    Today more than ever, the molding industry demands better product quality. The quality of molded parts is crucial with regard to their functional capacity, and hence a great deal of attention should be directed towards maintaining consistent tolerances and overall dimensions. As the demand for high quality final parts continues to increase, the controlling parameters of cavity pressure and mold temperature become ever more significant in the plastic injection molding process. Therefore, in this research, cavity pressure and mold surface temperature have been measured and recorded by pressure and temperature-pressure sensors using a Kistler CoMo 2869A injection-type apparatus. The influences of the measured factors on the quality of the final parts have been investigated experimentally. The results of this experimental study indicate that cavity pressure and mold temperature are the dominant factors determining the quality of the final product in plastic injection molding. (C) 2009 Elsevier Ltd. All rights reserved.
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    Analysis of the forces and vibrations effecting on cutting tool in the micro drilling of ti-6al-4v material produced by ebm method
    (2022-11-28) BAKIR, BARKIN; ATAKÖK, GÜRCAN; ŞEN, MURAT; ACER S., BAKIR B., ATAKÖK G., ŞEN M.
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    Three-dimensional finite element analysis of shaping curved root canals with the ProTaper and HeroShaper systems
    (SPRINGER HEIDELBERG, 2015) MUTLU MİTİL, BİLÇEN; Mutlu, Bilcen; Kurt, Mustafa; Ekici, Bulent; Atakok, Gurcan
    In this study, we simulated the shaping of a curved root canal with the ProTaper and HeroShaper file systems using three-dimensional finite element modeling. A total of seven of the Ni-Ti rotary instruments were employed to investigate the influence of cutting geometry. A workflow was developed using the mechanical design and analysis software I-DEAS 11 and the LS-DYNA finite element package. The three-dimensional tooth model was constructed from a micro-computed tomography dental scan and a simulated canal. It was found that stresses concentrated towards the outer aspect of curvature in the apical portion of the canal when the ProTaper file system was employed. For the HeroShaper files, the stresses concentrated in the middle portion of the tooth model. Our simulated root canal procedure enables the efficacy of rotary NiTi instruments to be evaluated in a patient-specific setting. This may aid the dentist in choosing the optimal tool set and provides data for improving tool design.
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    A review of mechanical and thermal properties of products printed with recycled filaments for use in 3d printers
    (2022-02-01) ATAKÖK, GÜRCAN; ATAKÖK G., KAM M., Koc H. B.
    Three-dimensional printers (3DP), which are often heard with additive manufacturing, are widely used in part production. Sensitive and custom-made products in different designs can be produced more easily and quickly, but waste specimen formed after the failed three-dimensional (3D) prints cause waste and environmental pollution from the expensive filament material. It is thought that such problems can be prevented by minimizing the waste when the scrap materials generated as a result of each production are recovered. This study investigated the benefits of recycling all possible waste filament specimens, including the supports removed from the part after the defective products or supported production, by granulating and reusing in the production of new parts in the next 3D production process. Mechanical differences between the 3D specimens produced with virgin filaments to be printed with recycled filaments are investigated and it has been determined that most of the countries cause environmental pollution due to the waste of materials including additive manufacturing and 3DP processes. The use of the filament material, which takes a long time to procure from abroad and is mainly procured externally, will be increased from one time to twice or thrice, thus facilitating the availability and preventing environmental pollution.