FIELD: production of composite sheet material. SUBSTANCE: apparatus has supporting plate 1 with vertical channels 17 and cavities 4 below channels. Tubular punches 6 for making openings in sheet 13 are positioned in channels 17 for axial movement. Punches 6 are provided with cutting edge on upper ends. Plate 1 has collector 12 for connection to vacuum line or compressed air source. Collector 12 is communicated with channels 17 and cavities 4. Each punch 6 has piston 5 positioned in cavity 4, whose side wall is provided with helical channel for engagement with step of piston 5. Upon molding of material 13 by diaphragm 15 openings are cut by punches 6. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 cl, 5 dwg
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