| 摘要 |
A method and an apparatus for manufacturing an envelope style bus seat back cushion includes the steps of opening a hinged mold and then spraying the cavity of the mold with an elastomeric skin. The hinged mold includes first and second sides having a cavity in each of the sides. The cavities of the mold combine to form a mold cavity. The sides of the mold include interengaging faces, ridges and recesses. The faces, ridges and recesses interengage to seal the mold. Once the first and second sides of the hinged mold are closed and intermate, the steps of injecting a urethane foam into the mold cavity of the closed hinged mold are inserting, quickly, a center core insert into the mold cavity of the closed hinged mold; curing the urethane foam; removing the center core insert from the mold cavity; opening the first and second sides of the mold cavity; and, removing and demolding the envelope style bus seat back cushion from the mold.
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