Forming method of a foam board

摘要

A forming method of a foam board includes a hard plastic top plate and a hard plastic bottom plate provided respectively on and under a foam board placed in a mold. In a forming process by heating, the peripheral edges of the hard plastic top and the bottom plate respectively bend downward and upward automatically and extend to stick on the peripheral side edge of the foam board and fusing and adhering with each other to make up an integral peripheral edge so as to elevate the rigidity and safety of the foam board and enable it endure grinding.