Method for forming high-impact transparent, distortion-free polymeric materials
作者： Edwin J. Oakey , Rodney M. Tinney
DOI:
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摘要: A method and apparatus are provided for forming a sheet of polymeric material, such as polycarbonate. mold is having halves that engage heated therebetween. Each the defines an interior cavity peripheral edge. The retained between edges vacuum generated within one cavities drawing therein, whereby sensing mechanism detects draw depth initiating cooling to cool temperature below glass transition material. series retention mechanisms about edge halves, biasing into engagement with opposing half. trimming further perimeter desired form.
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