Lego brick washer

This request was from a mate who buys 2nd hand Lego which usually needs cleaning and can get scratched if just washed in a tub or bucket - so he was looking for something lined to prevent that. This might equally be useful to anyone needing to wash, rinse and dry items that can be marked if they rub against hard plastic

It's a bucket that's mostly open at both ends, with a threaded lid that screws on, and TPU pieces which completely line the inside. It can be submerged in a tub then rinsed out with higher pressure water. Outside dimensions are 20x20cm, inside when lined approx 178mm diameter x 190mm tall.

I printed the body, lid, and handle in these photos with eSun cold white PLA and the liner pieces in eSun grey 98A TPU.

Printing & assembly

The handle is fixed in place using two heat-set inserts and M3x15 screws.  I used 3x5.7mm threaded inserts.

I printed the lid and body with 3 perimeters and 15% adaptive cubic infill. The handle I increased to 5 perimeters all round but that's likely overkill. You could print it with fewer but modify the area around the inserts with more. The TPU parts were printed with 2 perimeters, 10% adaptive cubic infill. All with 0.2mm layer heights and 0.4mm nozzle.

I used organic supports with enforcers painted on the M3 screwholes in the main body and the handle. The rest including honeycomb grille prints fine without supports. The main body printed with room for organic supports by rotating so the screw holes faced one corner of the build plate (see progress photo above).

The top and bottom TPU inserts are printed with modifiers to remove the top and bottom layers and change the infill to 10% rectilinear making the overall effect of a sieve. The modifier shape was a generic cylinder 177x177x25mm. I've included the TPU project file I used to print on Core One.

The lining for the side is printed as 5 identical belts to break up the print job. There are no supports needed for any of the TPU parts.