FIELD: processing of plastic materials; particular, manufacture of articles from oriented sheet thermoplastic materials. SUBSTANCE: blank is placed to device frame made of rigid material from metal with shape memory. Frame is made in form of one external and two internal contours circular in cross-section. Internal contours of frame are installed adjacent to each other to form common transverse stiffening rib. External contour of frame is installed at preset distance from internal contours to embrace them. Blank is fastened to device contours with the help of clamping device and heated. EFFECT: increased rigidity and precision of manufactured articles. 7 dwg
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