| 摘要 |
An individually fitted helmet liner includes a plurality of layers, each of which consists of a thermoplastic sheet formed with an array of pockets receiving the major portions of energy-absorbing spheres, the spheres of one layer being in register with the spaces between the spheres of an adjacent layer. The liner is fitted to an individual wearer's head by heating the sheets to a plastic state, placing the liner between an outer shell and the wearer's head, and applying tension to the layers around their periphery to deform the sheets to a degree determined by the relative position of the spheres. A mold member for use in making the individual resin-sphere layers and a method employing the mold member to make such layers are also disclosed.
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