To most Thingyiverse users this will mean nothing, but to some who follow my YouTube Channel, this is the Casting Tree that I've been developing - seen in several of my videos now.
Those familiar with John Campbell's Casting Handbook will be aware of the concept of a tapered sprue and pouring basin, devices typically included in sand casting to reduce porosity, prevent metal contamination and smooth the flow. I have taken these concepts and introduced them to the casting tree with, so far at least, great success.
It fits perfectly on a steel flask that has a outer diameter of 102mm and is no greater than 150mm tall. If you're in the UK and want to buy one, drop me a line on YouTube or via my website and I'll tell you which online store sells them.
To attach items to the main sprue (the trunk) I use positioning wax. This is wonderfully sticky stuff that holds very well and evaporates perfectly during burnout. Again this can be seen in most of my videos - like the one below.
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You can see me using this casting tree, albeit a reduced height version, in this video to great success.