Patent ID: 8303750

Claim:
A method of manufacturing an air mat, wherein a cushion part having a plurality of air pockets formed therein for containing air at the insides thereof is coupled with a lower sheet disposed on the lower surface of said cushion part, said method comprising the steps of: preparing a lower mold having a plurality of air pocket-molding recesses each having a given depth, for molding said cushion part; said lower sheet adapted to be coupled with said lower mold; and a cover adapted to be seated on the said sheet; conducting a slush molding process by pouring a resin composition into said lower mold for molding said cushion part; coupling said lower sheet to said lower mold and mounting said cover on said lower sheet, for covering the entrances of said plurality of air pocket-molding recesses of said lower mold; and, conducting a rotational molding process by rotating said lower mold coupled with said lower sheet and said cover thereon by means of a rotational molding machine, for bonding said cushion part and said lower sheet on said lower mold as an integral body, wherein during said rotational molding process scraps of said resin composition remaining on the surfaces of said plurality of air pockets of said cushion part in said lower mold are melted and partially diffused to said lower sheet, thereby bonding said cushion part and said lower sheet to each other.