[chbot] 3D print a small 'rubber' part

[Robin Gilks]

That might work - it wouldn't be too tricky to make a mold by hand -
basically stack a few 'o' rings (I don't have a 3d printer!!)


On Wed, Oct 2, 2024 at 2:00 PM Cass Jones <cass at cassjones.net> wrote:

> Could you print a 2 part mold in plastic, cover the surface in mold
> release and fill it full of RTV silicon?
>
>
> On 2 October 2024 1:31:05 pm NZDT, Robin Gilks <gb7ipd at gmail.com> wrote:
>
>> Greetings
>>
>> Rubber in quotes as I know you can't print rubber but is there someone on
>> the list who has tried 'rubbery' (silicone, elastomers) filament to produce
>> a replacement seal in a valve for my swimming pool auto-dosing device.
>>
>> What's happened is that the sodium hypochlorite has crystallized in the
>> valve where it mixes with the hydrochloric acid. This has jammed one of the
>> two valves (one for each liquid) and it's been like that for so long
>> (probably up to a year) the rubber seal on the end of the solenoid plunger
>> has distorted (it should be cup shaped but it's now an inverted cup).
>>
>> I really want to avoid the AU$430 + GST + shipping for a replacement
>> valve for the sake of a 20c bit of rubber that is all of 12mm diameter and
>> 6mm thick (even if it's an interesting shape).
>>
>> Any ideas of getting the rubber back to its original shape also considered
>>
>> Cheers
>>
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