Sample preparation mold for testing heat conductivity coefficient of graphite composite insulation board

The utility model relates to the technical field of building energy-saving insulation board material testing, in particular to a sample preparation mold for testing the heat conductivity coefficient of a graphite composite insulation board, which comprises a bottom plate, two baffles, an insertion plate and a cover plate, the two sides of the inner wall of the baffle are provided with inserting grooves allowing the two ends of the inserting plates to be inserted therein, a mold cavity is defined by the two inserting plates and the inner wall of the baffle, the cross section of the cover plate is the same as the cross section of the mold cavity, and the baffle is longer than the cover plate. Fixing holes for the bolt strip to penetrate through are formed in the middles of the two ends of the baffle, external threads are arranged on the outer walls of the ends of the bolt strip, and the bolt strip penetrates through the fixing holes and then is connected with nuts; and the bottom plate is connected with the bol