Deep drawability of biaxially rolled thermoplastic sheets

AbstractThe deep drawability of biaxially cold‐rolled thermoplastic sheets has been studied using polycarbonate, polyvinyl chloride, and acrylonitrile‐butadiene‐styrene polymers. Each polymer was rolled to two different reductions in thickness. The deep drawability of these rolled sheets was measured by determining the limiting draw ratio using a Swift cup test. Strain ratios were measured in three directions for each of the rolled sheets in order to determine the normal and planar anisotropy of the sheets. It has been determined that the drawability of a sheet can be correlated with the normal anisotropy of the sheet and it is the increase in normal anisotropy of a sheet which increases the drawability of the sheet. It has also been shown that lubrication increases the drawability due to a reduction in punch force.