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mattinker:

--- Quote from: tom osselton on July 28, 2014, 06:32:54 PM --- I think that the sand was actually adhering to the paint but we used them anyways.

--- End quote ---

That's what the parting dust is there for!

Regards, Matthew

tom osselton:
Well I am back from holidays and have picked up some new sand that my son told me about (Golden sand ) it is quite fine, it almost feels like velvet in the hand and puts playsand to shame it is supposedly used for mortar work and was told it is more expensive so with a sigh I paid them their 8 bucks for a measly 200 lbs :) it was then mixed by hand with 12 lbs of bentonite per 100 lbs of sand no water was needed the sand had enough moisture in it.

I have made up two new cope and drag’s and find the new sand rams up real nice but am concerned about porosity so I will make sure it has some vents popped through with a tig rod I have used 1/4" bolts as pegs so if I have to snug the two halves together I can use a nut to do so, the pattern you see was made by my father.

The molds packed really well!

I have never used a well so I tried it on one of the mold's

It seems that the well sucks more from the risers during cooling mind you it has more metal to cool.

And here they are finally a casting I can grin about I didn't like the first set but it was the best I had so these will replace the old ones.

One thing I noticed is the vent holes did not fill very much maybe next time I will use a larger rod.

Thats it for now :beer:

awemawson:
Looking very good Tom :thumbup:

Did you see my tip in NormanV's thread re: his vice, about using a bean can with both ends removed, rammed up with sand, and a hole cut with a tube to extend the height of risers and pouring basins? Works a treat. Form a funnel shape in the one used as a pouring basin.

vtsteam:
Really pretty castings, Tom! :clap: :clap: :beer:

tom osselton:
Thanks I am really happy with them I pushed the vent rod through about every 2 inches which I think helped but knowing a good casting was obtained helps boost the confidence looking to future cast's, one thing I will have to look into is a better pair of gloves I'm using welders gloves right now.

Andrew I did see your post about the use of cans to extend the risers I have some beer cans but nothing really bigger than that so I guess it will be weiner's and bean's for a couple nights!

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