Apparatus and method for the manufacture of particleboard

Details Apparatus and method for the manufacture of particleboard Apparatus and method for the manufacture of particleboard

1982-02-19

1983-12-13

Kimlin, Edward C.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 622, 1562722, 1562744, 1562755, 1563806, 156312, 156555, 1565835, B29C 1902

Patent

active

044203578

ABSTRACT:
A method and an apparatus for the continuous manufacture of particle board from a mat of cellulose based material in the form of particles, fibers or the like, together with at least one heat hardenable binder, features a high frequency heating station 4 disposed between a scattering station 2 and a finishing press 9. The mat 3 scattered in the scattering station 2 is continuously fed on an endless conveyor band 1 through a working gap defined between upper and lower electrode plates 5 and 6 of a high frequency capacitive heating arrangement in the high frequency heating station 4. A recirculating cover band 7 contacts the upper surface of the mat and the mat is moved with full-area contact between the upper and lower electrode plates 5 and 6, i.e. without any form of air gap. Several variants are described, in particular the upper and lower electrode plates 5 and 6 can be constructed to compress the mat to a certain degree. In the FIG. 2 embodiment several sequential pairs of electrode plates 5, 6; 5', 6' are used to heat the mat in stages with compression 10 taking place between sequential pairs of electrodes.

REFERENCES:
patent: 2697254 (1954-12-01), Gordon
patent: 2788838 (1957-04-01), Crabbe et al.
patent: 3256121 (1966-06-01), Abell
patent: 4221950 (1980-09-01), Lamberts et al.

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