Panel production device and panel production method

A panel production method comprising:

• transferring, in a transfer direction, a panel having a core member that includes a thermoplastic resin and is formed in a corrugated shape, and a first faceplate that includes a thermoplastic resin, is formed in a plate shape, and is joined to a surface on a first side of the core member;
• supplying a second faceplate toward a surface on a second side of the core member, the first and second sides of the core member being opposite sides, the second faceplate including a thermoplastic resin and being formed in a plate shape;
• heating a surface of the core member facing the second faceplate;
• and
• pressurizing and welding the core member of the panel and the second faceplate,
• wherein the heating is performed with a heating part, and the pressurizing and welding is performed with a pressurizing part,
• wherein the core member has a shape in which peaks and valleys are alternately and continuously formed,
• wherein the heating part is provided at a position on an upstream side of the pressurizing part relative to the transfer direction, and has a shape which extends toward a space between the core member and the second faceplate to be welded,
• wherein the heating part includes a laser irradiation device that emits a laser and a scanning part that bends and scans the laser, and
• wherein the heating includes raising a temperature of tops of the peaks of the core member relative to bottoms of the valleys of the core member by scanning the laser irradiated from the laser irradiation device with the scanning part.