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QSD Face Shield is a simple, reliable, comfortable and economic face shield with frame printed by 3D printers. Different types of visors can fit in the shield frame including transparancy films, and the visor angles can be adjusted as desired. This is especially critical in the unprecendented time of COVID-19 outbreak for healthcare personnel. Regular people can find it useful too. The key features are:
- The frame is easy to accomodate various visors and the visor angles can be adjusted as desired. The visors are fixed by clips at any desirable angle. A pair of clips is provided for very thin visors such as transparancy film (0.2mm thick) and commonly used visors with thickness of 0.04" (1mm). Other customized clips can be produced within 7 minutes per pair. The clips can hold the visor tighly thanks to the wall roughness of the 3D printed clips.
- No holes and pegs in the front of the visor to avoid infections
- The frame is easy to produce. No complicated structures. Even low-end 3D printers can print it easily.
- Efficient use of materials with good rigidity. Consume 25g PLA per face shield when typical 3D printer settings are used. The print time is 2.5 hours per face shield with typical settings. The typical settings include 0.4mm line width, 0.2mm intial layer height, 0.3mm layer height, wall thickness of 0.8mm, top/bottom thickness of 0.9mm and 30% infill with grid pattern.
1) Pre processing:
The QSD face shield is able to fit most of people. If the size needs to be changed, the frame 3D model can be scaled up/down in the CAD software. But keep in mind the hook positions will also change and the holes need to be punched on the visor accordingly. For a transparancy film, if the original design is used, punch holes with 4mm diameter at a position 8mm away from the edge on both sides. The height of the holes can be chosen based on needs.
2) Typical 3D printer settings
0.4mm line width, 0.2mm intial layer height, 0.3mm layer height, wall thickness of 0.8mm, top/bottom thickness of 0.9mm and 30% infill with grid pattern. This will have a medium strength build. It takes about two and half hours to build.
3) Post processing
Install one side of the visor on the hook first, then pull the other side so that the visor can be installed on the hook of the other side. Adjust the visor angle as desired and push the clips into the hook to fix the visor position. Each of the clips has two legs which have different sizes. One leg is for thin visors about 0.2mm thick such as transparancy film. The other leg is for visors with 0.04" or 1mm thickness.
QSD Face Shield v5
email: qixy@yahoo.com