Potters Without Borders

Ceramic Pot Filters treat water borne disease.

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Filter setter project timeline

Pan Ring Setters 2
Version 1: Pan ring
– Currently in use in some factories manufacturing round bottom filters.
– Round bottom filters nest deeply allowing for denser stacking.
– Hand pressed into molds.
– Variation, using pieces of cut rejected filters.
– Weight is distributed onto filter rims in 3 point compression.
– Weight of stacked filters is distributed in compression cumulatively onto filter rims below.

DSCF08472
Version 2: Interlocking setter block
Abandoned during prototype process due to complex moldmaking process.
– Weight distributed in compression consecutively onto setters.
– Individual filter weight distributed in 3 point compression on rims.
– Interlocking nodes assist with locating setters.
– Hand pressed into plaster molds.

IMGP0268
Version 3: Ring Setter
Abandoned during firing testing.
– Weight of stacked filters is distributed in compression cumulatively onto filter bottoms below.
– Wheel thrown
– Firing test failed due to stress fractures. Possible cause: shrinkage differential, faulty weight contact distribution.

DSCF6259
Verion 4: Pitet Setter
Currently in prototype phase.
– Original master was jiggered, causing various difficulties.
– Proposed masters to be Lathed (CNC) or 3DP.
– Individual filter weight distributed in 3 point compression on rims.
– Interlocking nodes assist with locating setters.
– Weight distributed in compression consecutively onto setters.
– Potential to be manufactured from filter medium.

Preliminary prototype manufacturing method allows for reasonable minimum daily production, however not all materials necessary to build the mechanism are widely available (8″ plastic pipe).
First test firing results proof of concept passed. Next phase begins field trials and feedback process.
Field trials will select a partner CWF factory to produce and test the setters on a production scale. Comparisons will be made in terms of durability, labor time, fuel reduction, packing density, and applicability to various filter shapes.

Video link: http://youtu.be/NLnjDE5jxSY

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