static shock is just an fancy word for flame flare up and spiting out of an object out of an molting hot extrusion , it is floating around especialy at utube . i know some guys brave enough to melt in an used can that beans come in for a one shot melt... not me amigo , not me , i am not that brave . i break up trnsmission by open pit fires , and rims too , i have to burn off here any way limbs and stuff . i just throw them on top of the fire and sit in lounge chair . if you have an yard you can dig in you would love the pit.. i will post pictures soon i hopeI got play sand at Walmart it works great. Where Walmart got their sand I do not know? I sifted it through a window screen I had less than a hand full of stones. This stuff was already wet to keep down the dust I guess being it's silica sand. I used the special kitty cat litter ground up for the clay
10 to 1..... 10 lbs sand 1 lb litter. This sand gives a fairly smooth finish on the castings. You can look back on this thread and see the results of some of my castings.
I don't use anything special in the sand. I'm trying to do it cheap. I'm spending the money on the steel parts. good cold rolled steel and the nuts and bolts.
I went to Harbor Freight and talked them out of a 6" china vice that sells for $80.00 got them down to $40.00 with out using coupons or specials just some BSing basicly I got the vice at their .
cost.
My fist vice is getting loose in the threads I think the casting is going to let go or its getting close to stripping out for it being a 20 year old harbor freight type (4"vice) I think I got my money's worth out of it. I'll still use the 4" vice until it craps out, but now with this 6" I have more capacity
for making the shaper and mill. I'm going to cast some soft jaws for the vice soon. I plan on casting the sheaves for the shaper using the lost foam patterns, I hope to be able to make them with the grooves in place, with the pulley shaft hole by using a 5/8"" steel mandrel in place. Once cast drive the mandrel out with the press. Should be "very little machining needed"
famous last words.
To make the sand firm for cores I think you need sodium silicate(water glass) mixed in the sand then set the core with Co2 gas. co2 gas I think can be made from vinegar and baking soda but I'm not sure. When I get to making cores I plan on using molasses to make a baked sand core. The way to do it is in the Gingery books.
I've used some very damp sand due to the very low humidity where I live to help keep from having steam inclusions in the cast part just use a coat hanger wire. push it down to the pattern spaced about 1" apart all over the pattern top and bottom, on the bottom after venting with the wire I lightly rub over the holes cause if you don't the liquid aluminum can leak out of the mold. I found that out by loosing most of the metal in one casting it set the grass on fire good thing it was on the grass and not on the pavement. Did I say casting it fun?!!!
To just melt metal and pour them into pigs or ingots . Make a ingot mold out of scrap angle iron weld the iron into trays if you watch the video of me casting you will get the idea of how to make that ingot mold no need for sand. Pop cans are a lot of work to melt from what I've heard so I haven't done many. I do melt down aluminum foil and all the aluminum shavings if I had aluminum cans I'd do them too. I have some aluminum pots and pans to cut up to melt along with kitchen utensils that are aluminum. I seen where one guy was using a log splitter to bust up transmissions and engine blocks to melt that gives me some ideas!
Don't be afraid to experiment but do think what the result could be before you do something strange. One of my biggest fears is spilling aluminum on my feet or getting a blast from the furnace from a oil smoke cloud. I'll do a cold practice run on a pour with all the tools just to make sure I do not have a tripping or stumbling hazard first.
Have fun and be careful not paranoid.
I'm not sure what you are talking about "static shock"????
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