Patent ID: 7878229

Claim:
A method for manufacturing a hollow structure plate comprising: introducing two thermoplastic resin sheets into a pressure-reduced chamber; attracting and attaching the resin sheets respectively to a circumferential surface of each of a pair of upper and lower emboss rollers that are arranged rotatably in said pressure-reduced chamber to form a multitude of hollow protrusions on each of the resin sheets in accordance with a shape of a pin projected in each of the emboss rollers; and thermally fusing the end faces of said hollow protrusions in a position of a contact line of the emboss rollers continuously; wherein introduction guides are arranged respectively above and below a sheet-introducing opening portion of said pressure-reduced chamber, each of said introduction guides being inclined toward a direction of the contact line of each of the emboss rollers; wherein heating means for thermal fusion is provided between the introduction guides, said heating means being arranged in a non-contact manner between said resin sheets; and wherein each of said resin sheets is attracted and attached respectively to the circumferential surface of each of the emboss rollers under a reduced pressure by maintaining opposing surfaces of said resin sheets in said pressure-reduced chamber at an atmospheric pressure and reducing a pressure at surfaces opposite therefrom.