Continuous press for hot pressing a mat

Abstract

The continuous press for hot pressing a mat as a step in making chipboard, fiberboard, laminated board and similar composite materials comprises heated platens, upper and lower pressing plates and press belts which are guided on roll rods in a pressing region which run between the heated platens and the press belts. The roll rods are guided over a guideway around the upper and/or lower pressing plate with the help of an upper and a lower roll rod circulating mechanism which has guide chains and a roll rod feed mechanism with entrance-end roll rod feed wheels. Roll shoes are located at the entrance end in the vicinity of the guide drums for the pressing belts and the roll rod feed mechanisms. The associated press belts are guided with the roll shoes. The roll shoes also have auxiliary rolls which are guided over another guideway and which are guided on the press belt side over shape-determining guide surfaces. The roll shoes and the entrance-end roll guide wheels have common side walls which are connected with hot platen portions protruding beyond the pressing plates. Closing piston-cylinder units can be connected between the side walls and the press frame, with which the gap width between the roll shoes in the vicinity of the roll rod feed wheels may be adjusted by deformation of the protruding hot platen portions.