Re: Investing and Bubbles


Bramblebush ForumsFAQ

Posted by bpfink on April 02, 1999 at 08:11:42:

In Reply to: Re: Investing and Bubbles posted by Dan Caster on March 24, 1999 at 19:47:24:

Keeping the sprues and vents solidly attached is definitely a must.

Some do it via special or tacky waxes and gentle handling,

or a swipe of hot knife between ther spot as you attach them,

or a wood burning tool tip carefully plunged in the spot after

the two are together so the location remelts.

And on and on and on.

It is really just one of the many steps to make the whole cast

successful and may need special emphasis by the instructor prior

to each individual discovery of another student casting failure.

So here is my secret attachment system and could work for you

in whatever scale you use:

I like to take a round, strong toothpick and attach the two wax junctions together with it acting like a thin peg. Often even do 2 or 3 per spot 'toe nailing' them in at opposing angles and do leave the ends sticking out a 1/4 to 1/2 inch or so. Then tie them all together with a fine plastic cord (similar to dental floss) and you will even be able to hang that little baby up by it. Makes for the one of the stronger attachments I have ever found.

Remember this is for large works and may be overkill for smaller bits but variations will definelty help you conquer the problem.

Now if you want to know about the MOST better yet and very great strongest system I use... but not for now. Hint... it involves a long wax dipped coated segment of speedometer cable which is pulled out from the top after the burnout....


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