PRODUCTION OF SHAPED ARTICLES FROM ACRYL THERMOPLASTIC SHEET Russian patent published in 2015 - IPC B29C51/10 B29C51/36 B29C51/42 

FIELD: process engineering.

SUBSTANCE: proposed process comprises cutting a workpiece from the sheet, heating of said work piece to forming temperature, placing it on female die opening surface for forming recess, straining and cooling. Said workpiece is cut as a fragment shaped to female die opening with positive allowance over peripheral outline equal to 0.1-0.25 of opening size over its surface. Straining is performed by evacuation of female die forming recess. Workpiece setting in female die is controlled by equal distance of workpiece edge from female die opening surface and corrected by mechanical impacts on workpiece edge not sufficiently set. Female die depth is selected proceeding from workpiece setting below female die opening surface level.

EFFECT: simplified process, higher quality of product.