Filament Drying Box Unwinder

Numerous applications already exist for a filament drying box.

I purchased the following on Amazon: https://www.amazon.de/dp/B0CFLJCJSF?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

The first insert I found and printed had excessively large slots, causing the silica gel beads to fall out.

I modeled my own insert. Silica gel beads can be added at the front and rear. The lids are laterally retained by a lug and further secured with M3 screws and embedded nuts.

The filament spool rests on eight ball bearings. For narrower spools, two spacers can be inserted; these are stored in the base when not in use. The ball bearings are glued onto 8mm tubes; screws offer insufficient space within the container.

Update: the model now incorporates printed axles connected with DIN912 M3x40 screws.

A 4mm hole is present on the narrow front, allowing for the insertion of a PTFE tube. This design encourages the spool to be drawn into the ball bearings during unwinding, preventing easy lifting. An M6 thread can be cut into the 4mm hole. This allows for the external screwing of a PC4-M6 hose fitting, sealing the container at that point.