 Acurad was a die casting process developed by General Motors in the late 1950s and 1960s . The name is an acronym for accurate , reliable , and dense . It was developed to combine a stable fill and directional solidification with the fast cycle times of the traditional die casting process . The process pioneered four breakthrough technologies for die casting : thermal analysis , flow and fill modeling , heat treatable and high integrity die castings , and indirect squeeze casting ( explained below ) . 
