Patent ID: 8092210

Claim:
A mold for producing door cores, where the door cores are made of a material formed from wood and glue conglomerate particles in three layers forming a sandwich of a uniform thickness whose outer layers are made of smaller particles and of greater density to that of an inner layer which is thicker and made of larger particles, this material being supplied from respective formers for filling a mold and then being compressed between the hot plates of a press; where the inner layer in turn has a greater density in its periphery than in its central part for each door core obtained in a single pressing, where the periphery of the inner layer comprises spars, end cross-members and central cross-members, comprising: a fixed perimeter frame following the contour of the door core or a multiple of the surface thereof in order to obtain several door cores simultaneously and separate them afterwards by cutting, the height of said perimeter frame being greater than the thickness of the door core prior to compacting; a first rectangular framework for forming the periphery of the door core, whose surface includes as many apertures as there are door cores to obtain simultaneously, of smaller dimensions and in a concentric position with respect to them, the rectangular framework being hydraulically driven to be displaced from a lower position in which it will receive a product from the formers in an uncompacted thickness for filling the mold, up to a raised position for compacting the product which remains with the thickness corresponding to that of the standard doors; at least one independent second rectangular framework which can be telescopically displaced inside each of the apertures of the first rectangular framework for forming the door core with its voids if there are any for panelling or glazing, also being driven by hydraulic cylinders and of the same height as the first rectangular framework; an upper hot plate, vertically movable, which constitutes a hot plate of the press and which is also hydraulically driven in order to close the mold when contact is made with the fixed perimeter frame; and a lower horizontal platform that is movable vertically and is hydraulically driven, on which rests a first rectangular framework which is integral with it, fitted to the dimensions of the void of the perimeter frame and which can slide inside it in the manner of a plunger; wherein the upper hot plate of the press and the first and second rectangular frameworks which materialize the lower hot plate thereof, on which the particles of conglomerate and glue lie, furthermore incorporate outlet nozzles for hot air or steam, as well as a heating system for melting the urea-formaldehyde glues.