Manufactoring method of A box made several-layer plasticboard and its equipment

摘要

PURPOSE: A box made of a multi-layered foam synthetic resin board is provided to improve the appearance, heat insulation and surface strength of the box. CONSTITUTION: A multiple layered foam synthetic resin board is formed by joining a foam extruding sheet layer(102) to the top and bottom surface of a foam forming board layer(101). A V-shaped joined surface(103) is formed at the edge of the foam synthetic resin board. A bent fusion part is formed by bending the V-shaped joined surface.