I have a part that a customer sent to me which I imported into Solid Works.

I need to take that part and produce the opposite of it or negative so we can cut a mold of the original part. That mold will be used to cast the final product.

Is there a feature in solid works to easliy do this?  It is some what of a complex part with curves and rounded edges.

Any thoughts or ideas would be helpful.

Thanks,

Jerry