3d printer fillament wiper (mold/mould)

Filament wiper mold for 3d printers.

In the pictures (Blue) is V1. black is V2

There's many off the shelf parts you can use with quite large or are fiddly to install etc.
My printer uses picture frame clips that are abundant and cheap and it seems a lot of people are using them. You can increase the tension in them by bending either the arch or the clip inward for your own suitable needs.

I designed this model with an insert that the nozzle wiper indexes in and the pour rubber/silicone can hook into. giving it a sturdy anchor that will fit in between the empty space of the picture frame clip. You use two clips to fix it into place. And its removeable/replaceable whenever. 

If your silicon doesn't adhere too well or is too flexible (i use a 40-50 hardness material usually mold silicone is about 20-30 so more flexible) use some kind of adhesive that's compatible. Overall it should be enough with the features designed in. 

V1
Tips and requirements:
1: use 0.12mm layer height or lower. A rougher surface increases the chance of it sticking to the mould. Mold release/vaseling might help if it sticks non the less.
2: use 2 component or in general, pouring temperature resistant rubber/silicone. RTV is an adhesive and unless you got some REALLY good mould release. It WILL stick, I speak from experience. Other then the fact that RTV needs atmospheric moisture to cure so if  you seal it it can take up to a week or more to cure.
3: Print at low speeds, and lowest temperature you can so it wont flex the mould.
4: The lid and insert are optional with its 2 M3 bolts and nuts. If your table is flat, you can just fill to the brim and let cure (if you don't take into account the silicone expanding. The insert is optional IF you use stiff silicone. Otherwise its a requirement. 
5: the picture frame bed clips are required to attach it to the printer.
6: custom G code, many sources online for a start g-code. I don't post it here as it depends what movement you want to make and the location where you place it as you could place this anywhere on the bed. 
7: Be patient let it cure fully. After you use it it's reusable, i recommend putting a THIN film of dish-soap inside as mould release. 
8: If you get air bubbles filling up the mould first then putting in the insert can help a lot. Also putting your phone on vibrate and using it to vibrate the mould for about a minute does wonders. 

Options:

• Insert 1 is a tight fit only for well calibrated printers. It has a 0.1mm offset/gap.

• Insert 2 has more leeway. Also added some left and right gaps so it is a “loose” fit. 

You can play with it as you like taking insert 1 and scaling it by % down to make it fit perfectly. Or print out a few at different sizes  to see what works. It doesn't take a lot of plastic. 

V2
Print at 0.28mm layer height (others might work)
use 2 component or in general, pouring temperature resistant rubber/silicone. RTV is an adhesive and unless you got some REALLY good mould release. It WILL stick, I speak from experience. Other then the fact that RTV needs atmospheric moisture to cure so if  you seal it it can take up to a week or more to cure.

Long yap video about the process: