Ultrasonic-assisted wood veneer dyeing method

The invention discloses an ultrasonic-assisted wood veneer dyeing method. The method includes the steps of wood pretreatment; placing pretreated wood veneers into a dye vat and injecting dye liquor into the dye vat; opening a circulating system to enable the dye liquor to flow circularly in the dye vat, opening a heating system after the dye liquor circulates stably, opening an ultrasonic assisting system after the dye liquor reaches the set temperature, and subjecting the wood veneers to ultrasonic treatment. The ultrasonic-assisted wood veneer dyeing method has the advantages that ultrasonic treatment and wood veneer dyeing are conducted simultaneously, dyeing efficiency is high, and pressure equipment is not required; by means of ultrasonic treatment, new fluid passageways in wood are broken through, new dye molecule sorption sites are provided, dye liquor activation energy is improved, wood permeability can be improved, dye dye-uptake rate can be increased, dyeing time is shortened, dyeing temperature is lowered, dyeing effects are enhanced, and the method is applicable to thick veneers and is energy saving and efficient.