Originally Posted by
Bear
how do you use wood in making a mold? I though those were done with wax, or clay, or stuff like that
Bear this is only the pattern, once the sand has been rammed around the wood pattern it's then removed from the sand leaving a cavity to be filled with molten metal.
The casting from this first pattern will have to have the internal groves machined into the finished aluminium casting, had i the money to purchase RTV silicon rubber could have machined the groves into the wood then made another mold to cast a wax pattern which then would have been encased in plaster then cured then melted the wax out leaving a cavity for the molten metal.
Lost wax is not for production runs and requires more equipment, wood is cheap and I do not mind having to machine the groves in.
The bowel I'm making will look similar to the one below.
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