PRODUCTION OF BUILDING PANEL

摘要

PROBLEM TO BE SOLVED: To produce a homogenous building panel with high productivity. SOLUTION: In a method for producing a building panel by injecting a urethane resin 2 into a metal siding 1 having rising parts 11 provided to the end parts to foam the same, the injection port 7 injecting the urethane resin 2 is reciprocally moved in the direction crossing the transfer direction of the metal siding 1 at a right angle while the metal siding is placed on a conveyor 9 to be transferred to inject the urethane resin into the metal siding 1 from the injection port 7 so as to draw a sine curve.