System for hot pressing cellulosic and lignocellulosic mats

Details System for hot pressing cellulosic and lignocellulosic mats System for hot pressing cellulosic and lignocellulosic mats

2006-11-14

2006-11-14

Gupta, Yogendra N. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Air felting type shaping means

Means forming stratified products

C425S144000, C425S170000, C425S421000, C425S456000, C425S407000

Reexamination Certificate

active

07134858

ABSTRACT:
A system for pressing lignocellulosic and/or cellulosic materials to produce composite products such as medium density fiberboard subjects a mat of material to alternating or vibratory forces applied to a face surface of the mat. The frequency of the alternating forces may be between 0.2 Hz and 2 Hz. This vibratory pressing action causes heat to be transferred more quickly to the core of the mat from the surface, and reduces the pressing time required for thermosetting resins within the mat to cure. The system comprises a press for accepting the mat; a sensor for sensing a parameter indicative of heat in the core of the mat; and a control system for controlling the application of vibratory and non-vibratory forces to the mat.

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patent: 2 380 651 (2001-02-01), None
Vinogradov, V.A., “Analysis of Energy Parameters During the Vibrational Pressing Process”, Mezhvuz Sb., Nauch. Tr., Tekhnol. Oborud. Derevoobrabat Proizv. (Kulikov, V.A., et al., ed.): 56-59 (1987 Leningrad).

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