| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a foamed heat insulation board employing an open injection method without employing a closed injection method and, in this instance, prevent the occurrence of deformation such as warpage without using another new sealing material or an outer peripheral frame sustaining mold. SOLUTION: The manufacturing method of a foamed heat insulation board comprises the steps of inserting an outer peripheral frame 7 between an upper surface board 5 and a lower surface board 6, defining a closed space by fastening integrally the upper and lower surface boards 5, 6 and outer peripheral frame 7 and, at the time of injecting foaming resin liquid, after fabricating a tentative assembly of the upper and lower surface boards 5, 6 and outer peripheral frame 7 in a foaming mold including a lower mold 1 and an upper mold 3, absorbing and separating the upper surface board 5 by absorption materials set on the upper mold 3, and open-injecting foaming resin liquid 9 into a space defined by a lower surface board 6 stayed in the lower mold 1 and the outer peripheral frame 7. Also, it is preferable that a temperature difference is previously made in a preheating temperature between the upper surface board 5 and the lower surface board 6 by the upper and lower molds 1, 3. |
