SYSTEM, METHOD AND DEVICE TO MANUFACTURE FIRE-RESISTANT DOORS Russian patent published in 2011 - IPC E06B5/16 

FIELD: construction.

SUBSTANCE: fire-resistant door comprises the first panel complying with the door size, arranged with the possibility of processing, attached with its rear side to the rear side of the second panel according to the door size, made with the possibility of processing, so that the opposite longitudinal internal channels form two longitudinal internal channels at the rear side of each panel according to the door size. Each produced longitudinal internal channel is arranged with a plank. A perimetre channel on door sides includes a swelling edge material; an external layer to hide the swelling edge material. The first panel complying with the door size is made with the possibility of processing, and the second panel complying with the door size is arranged with the possibility of processing and comprises a lignocellulose substrate, wood, wooden composite material, fibreboard of medium density or their combination.

EFFECT: invention will make it possible to increase door strength.

25 cl, 13 dwg