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I received a roll of TPU for Christmas and was inspired by Biolooks Air Duster to produce my own set of Air Dusters. I am really into photography so the fine tip duster will be great for Camera and Lens cleaning.
In this design I have:
1.Included an integral thread to both Bellows and cap to provide a strong relatively airtight seal.
2.Sculpted bellows to make them easier to squeeze. Included some ribs to maintain bellows shape.
3.Included an all in one piece design.
4.Provided two types of interchangeable caps for fine and general use.
5.Included to sizes of bellows.
6.Uploaded bellows with two different wall thicknesses - 1.6mm & 1.2mm dependant on print capability and required stiffness of bellows.
1.No Supports required.
2.Bellows printed with 2 perimeters @ 0.2& 0.3 resolution @ 40mms. I set the slicer to have no infill for the majority of the part but included an 80% infill to the top of the bellows and thread area.
3.TPU used: Sunlu White TPU 1.75mm. The Sunlu prints well but due to the type of filament I noticed that the pre wound TPU stuck to itself and did cause some problems with extruding the TPU. I found unwinding and rewinding the filament a little more loosely helped.
4.Caps printed @ 0.2 resolution with 20%-30% infill.
I found that the 1.6 mm bellows @ 0.2 resolution printed much better than the 1.2 thick versions and created a greater force when compressed although stronger hands are required. The 1.2 versions printed Ok but struggled a little in terms of print quality on the overhangs\angled elements. The TPU on all versions prototypes printed worked has designed. I printed the bellows prototypes on a wahhau Duplicator i3 Plus due to it being a direct drive printer and the caps on a Creality CR10S.
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