APPARATUS FOR CORRUGATING SHEET MATERIAL Russian patent published in 1998 - IPC

FIELD: equipment for corrugating sheet materials by bending, possibly manufacture of light fillers for laminate panels. SUBSTANCE: apparatus includes systems of upper 6 and lower 7 punches. Each system consists of identical flat shaping members in the form of parallelograms jointly connected one with another along their sides and forming corrugated surface. Mutual orientation of upper and lower systems of punches is provided by means of upper and lower stoppers in the form of multiple-link units having flat members 12,11 jointly connected one with another for forming corrugation. Said upper and lower stoppers are connected by means of cylindrical hinges with systems of upper 6 and lower 7 punches respectively. Elastic members 9,10 are secured to surface of said multiple-link units. Drive unit of punch systems is in the form of detachable vacuum-chamber formed by bag of gas-tight material with possibility of sealing said chamber at side of blank feed to working zone between upper and lower punch systems. At process of shaping- vacuumizing said vacuum chamber follows contour of upper 6 and lower 7 punches. Unit for lifting upper punch system is in the form of rectangular frame having cross pieces, cross and longitudinal guides, and it is jointly connected with system by means of sliding units and stationary units. One side of frame may perform reciprocation motion in plane of frame at shaping process according to change of position of front edge of upper punch system relative to table plane. Drive mechanism for lifting upper punch system together with stoppers provides possibility of lifting and rotating frame together with upper punch system relative to axis parallel to one of its sides. EFFECT: enhanced efficiency, high quality of articles, lowered material consumption and reduced price of main units. 2 cl, 9 dwg