To prepare in a short time and efficiently a wooden core material in a continuous length used for a wooden interior material such as steps, a door and a flooring by using high-frequency press.
A plurality of sheets of laminae 1a are arranged each other in parallel through adhesive layers 2 to form a core material intermediate layer 1 and an untreated wooden core material A in a continuous length is prepd. by overlapping face materials 3 and 4 on the front and the back face of this core material intermediate layer 1 through adhesive layers 5 and 6 and an electrode plate prepd, by arranging alternately an oscillating grid 12 of an anode and an oscillating grid 13 of a cathode on the same plane is applied on the front and the back face materials 3 and 4 of this wooden core material A in a continuous length under a condition where length direction of the oscillating grid 13 is faced to the width direction of the wooden core material A in a continuous length and magnetic line of force is oscillated on the top part and the bottom part in the coating direction of adhesive layers 2 for laminae 1a and 1a each other by making the central part of the thickness of the wooden core material A in a continuous length symmetrical to surely and efficiently perform simultaneously adhesion of the laminae 1a and 1a each other and adhesion of the face materials 3 and 4.
YOKOYAMA YUKIAKI
TANABE HIROKI
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