A method for rapid tool manufacturing comprising the steps of first building an SFF pattern made of plastic to be used to make a first die half. Then there is the step of spraying metal onto the pattern to form a first metal substrate. Next, there is the step of separating the substrate from the SFF...http://www.google.com.au/patents/US5189781?utm_source=gb-gplus-sharePatent US5189781 - Rapid tool manufacturing
