METHOD OF CARDBOARD BOX PRODUCTION Russian patent published in 2004 - IPC

FIELD: equipment for mechanical working of paper or cardboard. SUBSTANCE: method involves profiled rolling paper with the use of drum with maximum diameter up to 1.5 m and under pressure of 140 kilogauss/m² of serrated surface; forming corrugations in working mating rolling profile with setting working temperature within the limits of 170^oC - 190^oC; corrugating backing paper; gluing backing paper with corrugated cardboard which forms single-ply cardboard; heating paper for excessive moisture evaporation; changing paper mass up to 120 g/m²; forming single-face corrugated board with the use of rotary shaft cooperating with cardboard; locating brass comb adapters relative rotary shaft for coordinating accurate coincidence between serration with crests and depressions of cardboard corrugations for friction reduction and elimination of gap between single-face corrugated board profiles and combs forming profiled cardboard; choosing gluing contact type on corrugator shaft during paper and backing paper arranging in normal direction; using doctor roll for glue uniform distribution over backing paper surface and corrugated cardboard surface; locating knives with prescribed width of blades installation for lengthwise paper and single-face corrugated board cutting; performing cutting paper sheets and corrugated board without corrugations damage due to use of four-blade rectangular rotary knife, wherein before usage thereof single-face corrugated board is put into sheet-cutter, setting prescribed corrugation height and pressure uniformity over sheet width; uniformly applying glue heated up to temperature of 70 - 80^oC between cardboard sheets with adjusting gap between gluing roller and gluing pipe and laying sheets of corrugated cardboard and paper from two sides for forming cardboard blank and with changing laying direction in each 100 sheets by rotation each next stack of corrugated cardboard; placing stack of glued sheets between upper and lover plates of press; holding sheets between press plates for 50 minutes; formatting form and punching cardboard sheets; preparing and erecting box, applying trade mark and item image on box surface. EFFECT: possibility of box production of two-, three- and double-double face corrugated board, extended application range, particularly for motor-car construction items packaging.