PURPOSE: To cheaply obtain this heat insulating panel, by forming flanges by bending the end edges of two outer wall materials, which are oppositely arranged, by fitting an end surface jig to the flanges, by injecting a urethane stock solution between the outer wall materials and by foaming the solution.
CONSTITUTION: Left and right ends are opened in a metal mold for foaming consisting of a drag 31 and a cope 32, flanges 12a, 13a are made up by bending the end edges of outer wall materials facing to the opening portions at right angles to the opposite outer wall material side and flanges 12b, 13b are built up by bending upper end edges. An outer wall material 12 is inserted into the drag 31, and an end surface jig 35 is disposed which has shape conforming to the opening portion 33 of the metal mold and its center is provided with a convex portion 36. An outer wall material 13 is inserted in a method that the flange 13a is mounted along the convex portion 36. The opening portions are sealed with adhesive tape, and the cope 32 is installed. A urethane stock solution is injected from an injection port 39 mounted to the end surface jig 35, and formed, thus obtaining this heat insulating panel.
INAGAKI MASABUMI
SAKAI KATSUHIRO
