Metal faced sandwich composite board and manufacturing method thereof

The invention relates to a metal faced sandwich composite board and a manufacturing method thereof. The composite board comprises two metal panels and a sandwich layer arranged between the two metal face panels. The main body of the sandwich layer between two interfaces is a preformed core board and the parts of the sandwich layer at the two interfaces are polyurethane cores. The manufacturing method comprises the following steps: The upper and lower metal panels of the core board are compounded to obtain a semi-finished product of a composite board; the semi-finished product of a composite board is reserved with polyurethane foaming space positioned at the interfaces; polyurethane foaming agent is filled inside the polyurethane foaming space of the semi-finished product of a composite board; polyurethane core interfaces are formed after being formed and solidified. The main body of the sandwich layer is made from the core board, which reduces composite cost of the composite board, the joints are cured by the