Multi-solution modular spool for refill filament

Once printed on site it will be useful for housing ready-to-use a roll of original "refill". It features two recesses in which to thread a peg of the shape required for the refill's paper holder rotation lock (only one is needed out of a total of 4 recesses, three must remain free). There is also provision for not fitting this insert so as not to have this protrusion on the inner surface but this does not apply to the use of original refill units.

The method of coupling the two half-wheels was provided by three 6mm metric thread screws having flat heads. The screws can be inserted either on one side or the other of the spool once it is composed including the spare filament. In case it is useful to have a particularly strong opening support reel, consider that it will be possible to assemble it up using six screws instead of three. The length of screws that can be used is between a minimum of 20 and a maximum of 60 mm to assemble the model in the design called "half," while a 20/25 mm screws are recommended for the "flat" model.

One thing I have planned but have not used is to accommodate alongside the screw holes and in the "half" model only, up to twelve 8 mm diameter cylindrical button magnets held in place by adhesive or embedded (depending on the dimensional tolerances of the magnets and/or the print). The only caution is to remember to orient them magnetically correct to each other before permanently inserting them into the two half-wheels. Again, applying only six magnets might be convenient to hold the two half-shells together once the retaining screws are removed, when the filament is not loaded.

In case you wish to stop disassembling the stand once the two half-wheels are joined, you could study and print yourself cylindrical items to be inserted with minimal pressure on the 12 holes provided for the magnets and press the two halves together by gluing them together.

I think that for those who need a lot of support spools it is preferable to buy them together with the filaments or at least from teh shop that makes available the "refillable" one rather than printing this one, keep in mind that the material needed for its realization will be around 125+125 grams of PLA and several hours of printing. A variant proposed for the purpose of reducing the amount of material needed to make it has many grooves in the flat part of the outer disk, the filament needed for this version is 70+70+80 grams that is 40 grams less than the other full one.

Weighed the two models once printed, they confirm to me a weight of 245 and 205 grams respectively (excluding screws and magnets). Of course you can also print one solid section and one with slits to get a support coil with one face closed and the other machined once assembled together.

Please note, in order to properly insert the replacement filament blocking sealing tooth you will need to decide which of the receptacles you want to insert it into, clean the receptacle thoroughly by removing all the support material left over from the printout that keeps it clogged, and only when it has been well cleaned go to insert the intended blocking part.

Examples of available prints and possible couplings (see PDF manuals you can download..)

1 "Half" coil with two solid sides (screw fixing/magnet fixing)

2 "Half" coil with two different sides (screw fixing / magnet fixing)

3 "Half" coil with two open sides (screw fixing / magnet fixing)

4 "Flat" coil with two solid sides (screw fastening)

5 "Flat" coil with two different sides (screw fastening)

6 "Flat" coil with two open sides (screw fastening)

enjoy