Silicone/rubber cutting

Totally OT though it be, Vin, but stimulated curiosity as to what might be the right word for "conical but having blunt tip"

http://able2know.org/topic/212084-1#post-5297617

Your q however isn't at all trivial so I went out to my workshop, viewing all my tools racked up above my workbench, with no luck

One might use a grinder for the purpose though the result might lack symmetry. But then I consulted my Better Half, who is much smarter than I, and she suggested using a pencil sharpener. Flat out brilliant!

That is not at all like the mold I was visualizing.

Hi, thanks very much for the response. Good idea from your wife, and one that I have in fact tried. The trouble with that is that a pencil sharpener needs something hard to grip, and the silicone is soft. It was also suggested that I use modelling clay around the silicone cord (with the end sticking out) in order to fool the sharpener into thinking it's a pencil. However, to do this every time would not make this a viable solution. Any other ideas?

Only that my BH suggests the pencil sharpener might work after all, if it's the powered kind, which will put up less resistance. Also she says the kind you want has a rotating guide for different size pencils