Patent ID: 8052409

Claim:
A device for molding an air mat formed in such a manner as to integrally couple a cushion part having a plurality of air bags arranged therein for containing air at the insides thereof with a plate-shaped lower sheet disposed on a lower surface of the cushion part, the device comprising: a lower mold having a plurality of air bag molding recesses having given depths and arranged at given intervals thereon, for molding the cushion part of the air mat; the plate-shaped lower sheet disposed on a top portion of the lower mold, for covering the plurality of air bag molding recesses of the lower mold; a plate-shaped upper mold disposed on a top surface of the lower sheet in such a manner as to be coupled with the lower mold; a rotational molding machine for rotating the upper and lower molds coupled with each other such that a resin composite material is coated on inner surfaces of the plurality of air bag molding recesses and at the same time the cushion part is formed integrally with the lower sheet; the lower mold is provided with cut grooves each having a given depth formed on a partition between adjacent air bag molding recesses; and a plurality of communicating members are detachably mounted on the cut grooves, for making the plurality of air bag molding recesses of the lower mold communicate with one another, each of the plurality of communicating members having a communicating hole passed through both end portions thereof and having a length larger than the thickness of each of the partitions of the lower mold, such that when the individual communicating member is mounted on the individual cut groove, the both end portions thereof are disposed within the adjacent air bag molding recesses.