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molding my brass flywheel (1 viewing) (1) Guest
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TOPIC: molding my brass flywheel
#1022
molding my brass flywheel 3 Years, 1 Month ago  
i was asked on a previous post to show how i molded my brass flywheels. i will do my best to explain.

















the flasks are made from aluminium and if you look carefully you will see a blackish smudge around the top where the sprue was. the black just washes of and the aluminium is un harmed.
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#1025
Re:molding my brass flywheel 3 Years, 1 Month ago  
nice thanks for the photos. what is the size of flask. i will need 1 or 2.
i will look in to making a pattern for that type of a flask.
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#1026
Re:molding my brass flywheel 3 Years, 1 Month ago  
the flasks are 6 inches long 5 inches wide and each half is 1 1/2 deep. i had to make a large wooden flask to cast them in. each half took 1 kg of aluminium. 500grs was taken up with the sprue and gates and remelted for the next. i made six full flasks and really i need some more now that i know i can use them for brass
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#1030
Re:molding my brass flywheel 3 Years, 1 Month ago  
in the bucket is that your molding sand?
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#1032
Re:molding my brass flywheel 3 Years, 1 Month ago  
yes that is my sand that i havent mulled up since it was used. i use it for such tasks till it becomes totally dry. i then sift it ready for the next cast.i keep my sand totally dry and just use a large cooking pot to mix up the sand with my electric drill.
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#1033
Re:molding my brass flywheel 3 Years, 1 Month ago  
what is your sand mix recipe
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#1035
Re:molding my brass flywheel 3 Years, 1 Month ago  
i use fine silica sand and bentonite clay. i try for about 10 percent clay.
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#1042
Re:molding my brass flywheel 3 Years, 1 Month ago  
I'm such a dunce, I never thought of casting the flasks! You're a genius!!
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#1044
Re:molding my brass flywheel 3 Years, 1 Month ago  
tyza wrote:
I'm such a dunce, I never thought of casting the flasks! You're a genius!!im glad you like them. they will really open doors for your casting as i was getting mixed results with other designs.
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#1045
Re:molding my brass flywheel 3 Years, 1 Month ago  
xlchainsaw wrote:
tyza wrote:
I'm such a dunce, I never thought of casting the flasks! You're a genius!!im glad you like them. they will really open doors for your casting as i was getting mixed results with other designs. a point i must add . if you are to cast them make sure you leave the inside of the flask very rough! this gives the sand something to hold onto! i made some of the same design from metal. left smooth the sand wouldnt hold. i had to run a bead of weld around the inside to get them to work.
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