MOLDING METHOD OF SANDWICH STRUCTURE

摘要

PURPOSE:To heighten the strength of a molded object by a method in which the temper ature of a mold is regulated by the flow of warm water through a thermostatic hole, whereby the fluidity of raw liquid is raised, and before the raw liquid is solidified by reaction and molds a molded object, the desired position to be strengthened of the molded object is cooled by the flow of cooling a medium through a cooling hole, thereby molding a skin layer thick. CONSTITUTION:A cooling hole 7 is bored at the corner part 5b of the top force 5A which molds the corner part of the recessed part of a molded object. The inner diameters and the positions of the cooling hole 7 and the hole 8 for temperature- regulation are determined by the various factors of the temperature, conducted heat amount, specific heat and heat conductivity of the resin poured in a mold cavity 4 and the material of the top force 5A etc. The mold-temperature in the time when the raw liquids of two kinds are poured into the mold cavity 4, is regulated by causing the warm water of 40-45 deg.C to flow through a thermostatic hole 8. Before the raw liquids of two kinds poured into the mold cavity 4 is solidified by reaction and molds a molded object, the cooling medium cooled to about -5 - +10 deg.C by liquid nitrogen gas or Freon gas etc. is caused to pass the cooling hole 7 and cools the raw liquid in the mold cavity 4 adjacent to the cooling hole 7, whereby the skin layer with high density and desired thickness is molded, and its strength is improved.