Press spar for heated panel press
AssigneeMaschinenfabrik J. Dieffenbacher GmbH & Co.
InventorHeinrich Pfeiffer
Life of this patent
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Abstract
A press spar construction for a heated panel press producing chipboard panels and the like under elevated temperatures and pressures, the press spar structure having a thermal barrier arranged between each pressure plate and its supporting structure, the thermal barrier consisting of rows of insulating pressure blocks and spaced steel pressure blocks arranged between the insulating pressure blocks in the areas of maximum pressure concentration. The insulating pressure blocks are coated for imperviousness against humidity, and both types of blocks have metallic shrouds with anti-friction surface coatings. Shimming sheets are placed between the blocks and the shrouds, where necessary.
Claims17
In a heated panel press for the production of pressed, composite panels such as chipboard panels, fiber panels and the like, in which the work is pressed between opposing, heatable and coolable horizontal pressure plates mounted on upper and lower press spars, respectively, of which at least one is vertically movable, a press spar structure comprising in combination:
- at least two upright press spar members to which the associated horizontal pressure plates are operatively connected;
- a heat barrier in the form of a pressure resistant insulating bank interposed between the back surface of each pressure plate and a pressure transmitting end face of the associated upright press spar member;
- and
- at least one metallic shroud member encasing the insulating bank where it engages the pressure plate, so that relative horizontal displacements between the upright member and its pressure plate which are generated during operation take place between said shroud members and the pressure plate;
- and wherein
- each insulating bank includes a succession of insulating pressure blocks and at least one steel pressure block interposed between insulating pressure blocks, for the transmission of elevated pressures between the pressure plate and the press spar structure.
Dependencies are inferred from the claim text.