A METHOD FOR APPLYING ADHESIVE ON AT LEAST A FIRST WOODEN VENEER USING A ROLL COATER AND A ROLL COATER

摘要

A method for applying adhesive (330) on at least a first wooden veneer (101, 101 a, 101b) using a roll coater (500), the roll coater (500) comprising a primary application roll (210); a secondary application roll (220) such that an application gap (215) is left in between the primary application roll (210) and the secondary application roll (220); and a primary doctor roll (230), whereby a primary feeding gap (g₁) is left in between the primary doctor roll (230) and the primary application roll (210). The method comprises feeding the adhesive (330) through the primary feeding gap (g₁) onto the primary application roll (210), and feeding the first wooden veneer (101, 101 a, 101b) through the application gap (215) while rotating the primary application roll (210) and the secondary application roll (220), whereby the primary application roll (210) applies adhesive (330) onto a primary surface (111) of the first wooden veneer. The method comprises at a first time (t1): rotating the primary application roll (210) with a first application roll speed (va1(t1)) equalling the peripheral speed of the primary application roll (210) at the first time (t1) and rotating the primary doctor roll (230) with a first doctor roll speed (vd1(t1)) equalling the peripheral speed of the primary doctor roll (230) at the first time (t1). The method comprises, at a second time (t2): rotating the primary application roll (210) with a second application roll speed (va1 (t2)) equalling the peripheral speed of the primary application roll (210) at the second time (t2) and rotating the primary doctor roll (230) with a second doctor roll speed (vd1(t2)) equalling the peripheral speed of the primary doctor roll (230) at the second time (t2). In the method, the ratio (vd1(t1)/va1(t1)) of the first doctor roll speed (vd1(t1)) to the first application roll speed (va1(t1)) is different from the ratio (vd1(t2)/va1(t2)) of the second doctor roll speed (vd1(t2)) to the second application roll speed (va1(t2)).