Forintek Canada Corporation

Yongqun Xie

Xixian (James) Deng

Xixian Deng

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.

System for hot pressing cellulosic and lignocellulosic mats

A method and system for pressing lignocellulosic and/or cellulosic materials to produce composite products such as medium density fiberboard subjects a mat of material to a alternating or vibratory force normal to the top face of the mat. The frequency of the alternating forces may be between 0.2 Hz and 2 Hz. This vibratory pressing action serves to cause 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 has a press for accepting the mat; a temperature sensor for sensing the temperature of the core of the mat; a control system for accepting a first signal from the temperature sensor and in response to that signal causing the press to apply vibratory forces to the mat normal to the surface of the mat when the core of the mat is below a predetermined temperature. The control system is also programmed to cause the press to apply a non-vibratory force to the mat normal to the surface of the mat when the core of the mat is above a predetermined temperature, that temperature being within the range of temperature at which the resin in the mat is capable of curing.

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Fuzhou, China

Yongqun Xie