Preform shaping apparatus, preform shaping method and composite material molding method

A preform shaping method for producing a preform having a web, at least one flange, and a chamfered portion between the web and the at least one flange, the at least one flange being bent in a single side of the web, the chamfered portion being at least one of a round chamfered edge or a flat chamfered edge,

• the method comprising:
• pressing a first portion of a laminated body of fiber sheets by sandwiching the first portion between a first mold and a second mold, the first portion corresponding to the web, the first mold having a first surface fitting each of a surface in one side of the web, an inner surface of the chamfered portion and a surface in one side of the at least one flange, the second mold having a second surface fitting a surface in an other side of the web;
• and pressing a second portion of the laminated body of the fiber sheets after pressing the first portion, the second portion being pressed by sandwiching the second portion between the first mold and a third mold, the second portion corresponding to the at least one flange, the third mold having a shape fitting each of a surface in an other side of the at least one flange and an outer surface of the chamfered portion
• wherein the laminated body of the fiber sheets includes binder,
• the method further comprising:
• temporarily fixing the laminated body of the fiber sheets by the binder by heating at least one of the first surface of the first mold and the second surface of the second mold by a heater;
• and
• interposing a sheet, having heat resistance, heat insulating property and holes, between the laminated body of the fiber sheets and the at least one of the first surface and the second surface heated by the heater, and limiting, in the holes, heat conduction from the at least one of the first surface and the second surface heated by the heater to the laminated body of the fiber sheets.