Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
EFFECT OF ENGINEERING DESIGN ON PRINTING OPTIMIZATION OF THE FDM ADDITIVE MANUFACTURING TO MAKE FAST THE PFF2 FILTER PLA ADAPTERS FOR REUSABLE MODIFIED HALF-FACE MASK AS PPE AGAINST THE COVID-19 VIRUS
Submission Author:
Armando Hideki Shinohara , PE
Co-Authors:
Jose Matheus Domingos de Lira Andrade, Rafael Freire, Pedro Henrique Dreyer Leuchtenberg, Edmilson Silva, Armando Hideki Shinohara
Presenter: Jose Matheus Domingos de Lira Andrade
doi://10.26678/ABCM.COBEM2021.COB2021-1039
Abstract
The present work reports results of a study to mitigate the waste of filament and save the printing time through a systematic investigation of the effective engineering design to optimize the 3D printing. In order to convert a commercial reusable half-face mask with one valve, which originally was developed for industrial applications as a PPE - Personal Protection Equipment,, two kinds of PFF2 adapters were designed using a free licensed CAD software so-called DesignSpark. The printing of adapters was conducted using the biodegradable PLA thermoplastic filament of 1.75 mm in diameter by the Fused Deposition Modeling - FDM process. The 3D printer was model Ender5 of Creality, made in China. The layer height was from 0.1 mm to 0.2 mm, and nozzle temperature was kept at 209 C. Furthermore, to get a commercial grade mask, from a production engineering point of view, other relevant features such as lower price, face fitting comfort, aesthetics and general functionality were also quantitatively evaluated by the Quality Function Deployment - QFD method. The PFF2 filter employed was a commercial filter with 54 mm in diameter found in Brazil. As a result, a total of five different parts were designed using the CAD software to prepare three sets of PFF2 filter adapters to get a half-face mask. A total of thirteen parts were needed to prepare two side filter adapters and one frontal filter adapter. Among the five different parts, two main parts, so-called filter adapters, required special supports made of filament to be printed and so taking a considerable additional printing time. After printing out the adapters, the supports became a waste material. In the case of the frontal filter adapter, the first as-printed prototype weighed 29.1g and generated 14.1g of waste material. Improved third prototype weighed 19.3g and generated just 2.7g of waste material. So, about 81% of waste material was reduced just modifying the design taking into consideration the printing knowledge. Furthermore, the weight of the adapter was also reduced to about 20%. Regarding the side filter adapter, the first as-printed prototype weighed 16.3 g and generated 5g of waste material. After the printing analysis, a third prototype weighed 11,3g and there was no waste material. So, the weight of the side filter adapter reduced about 31% and waste material reduced 100%.
Keywords
Reusable Modified Half-Face Mask, Adapter for PFF2 Filter, PLA, FDM 3D Printing Process, CAD Design, Design Optmization, covid-19, Brasmasc Project
