Metal Casting Zone

Hello everybody I'm Italian, I just joined this forum I hope I can give plenty of advice.
Then I want try their hand at making aluminum castings for various objects and even mechanical parts, my goal would be to succeed in building a frame for pit bikes and minibikes in cast aluminum.
I proceeded to build a small furnace (I have yet to see if it works) but my first problem and the mold, as I entered the sand for molds I was wondering there are alternatives to this? I can explain other methods? ?
I heard that to get a piece of aluminum without bubbles within bubbles should be done aluminum with a gas but which one? For how long? How?
I also wanted to know if you can somehow enrich the aluminum of some substances such as silicon or other substances to improve the characteristics of 'aluminum. Thanks hello answer in many

Welcome to the forum!

Your post did not translate very well, but I'll try to answer some of your questions. A good aluminum to cast with can be found in automobile engine parts, intakes, pistons, or heads. They have a good amount of silicon in them. Make sure you don't have Magnesium parts by filing a spot and pouring a little vinegar or muratic acid on it, if it bubbles it's magnesium and may catch fire in your furnace.
The easiest way to get rid of bubbles in you metal is to melt your metal and cast it into ingots. then when you are ready to cast your parts, remelt the ingots and the bubbles aren't too bad. Or you can use a bubbler tube with Argon, I'm not sure how long you have to do it, not too long.
Find some books at a library on sand casting and pattern making.

Hope this helps.

Sorry for the translation but use google translator.
Thanks for the advice
Aluminum I have recommended to use (the engine) should be the family of aluminum alloys 6000 right?
Has good mechanical properties?
You mica table indexes are shown where the mechanical properties of these mechanisms?
Someone takes care of heat treatments of 'aluminum? practical guides that teach you how to do? hello thanks

4032 is a piston alloy. It has about 12% Si and casts pretty well. It's strong and can be machined. This site has info on several types of alloys and treatments. Wiki also has some info.

to understand
but that the casings of engines are aluminum?
nobody can tell me how to treat heat-aluminum?

quella del basamento composto di alluminio?
Qualcuno sa dirmi come calore di alluminio trattati?

Sorry, I can't help you with heat treating.