| 摘要 |
PROBLEM TO BE SOLVED: To provide an integrally molded helmet with reduced cost and the like. SOLUTION: The integrally molded helmet is produced by directly injecting foamed polystyrene granules into a preliminarily cast-molded hard shell, applying a heating pressurizing treatment to form a soft interior, thereby producing the space-free helmet in which both the components are tightly securely adhered. The helmet in which the soft interior is integrally molded in the hard shell is produced by the following steps: fitting the outer body of a molded hard shell to an upper mold, sequentially superposing the upper mold on a lower mold, heating the molds to soften the shell of the composite material, pressing the softened shell, discharging the resin excessive in the shell of the composite material, lowering the temperature to cool, injecting foamed polystyrene granules into the dent portion after the molds are superposed, foaming, pressing, lowering the temperature, and then taking out the molds. COPYRIGHT: (C)2011,JPO&INPIT
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