To provide a manufacturing method capable of efficiently providing a foamed resin extrusion molded object having coloration provided on its upper and under surfaces.

In the manufacturing method of the foamed resin extrusion molded object for extruding a foamed thermoplastic resin in a heated plasticized state by an extrusion mold 11 to mold the same, resin inflow port 30 separate from a foamed resin is provided to the upper surface in the flow channel provided to an extrusion mold, a non-foamed colored thermoplastic resin is allowed to flow in the flow channel from the separate inflow port 30 to provide a colored thermoplastic resin layer on the upper surface of the foamed resin in the extrusion mold and both resins are extruded to be molded. The extrusion mold has an inner wall surface dimension almost same to the dimension of the molded object to be manufactured and a core body is provided in the extrusion mold. A Celuka method for mainly performing foaming toward an inside cavity part in the extrusion mold is used.

COPYRIGHT: (C)2008,JPO&INPIT