Making quick fluid filters

by siderits, published

Making quick fluid filters by siderits Aug 4, 2012
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I needed some quick and cheap fluid filters for a prototype piece of field research equipment. Here's a quick way to make coarse and relatively fine fluid filters of almost any diameter and contour shape (round, square, irregular etc...) using a simple trick where you create a solid object like a shallow cylinder then STOP the print just after the raft is set down and BEFORE the object starts printing. You are using the RAFT as the fluid filter not the object that defines the contour. You have a useable fluid filter in less than 3 minutes that has a "pore" size down to about 50-100 microns (yes I checked on an optical micrometer). The pore size can be 1mm if you only let the first layer of the raft print. It goes down to 50-100 microns if you let the overlying raft layers print also. You can also eliminate the outer rim if you want by changing the settings for the print. One nice feature is the automatic support bars that are laid down under the raft. I printed this on an UP!3D printer at normal resolution.


Print out any solid shape, but STOP the print after one or more of the support raft layers prints then use the raft as a quick customizable fluid filter.

As you can see the object is just a shallow cylinder. It has a diameter of 30mm and the raft is set at 5mm so the filter will have a diameter of 40mm with a 5mm rim. You can trim the rim or create any kind of filter holder that you need.

Inspired by (but with different approach) user: Wauter Fine Mesh Screen


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Great idea, sure saves a lot of time doing it this way. :)