|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||264/113 ; 264/045.4 ; 264/126 ; 264/321|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 11 인용 특허 : 7|
A mold assembly and method for molding a substantially hemispherical construct from pre-expanded polystyrene beads. The mold assembly includes a female half mold; a mating male half mold; a first male mold insert mountable on the male half mold and having a continuous, peripheral, beveled edge; and a second male mold insert mountable on the first male mold insert. For forming a construct having an impact-resistant exterior layer and an energy-absorbing interior layer, such as a motorcyclist safety helmet, the beads are initially molded under heat and com...
[ I claim:] [1.]1. A process for molding an expanded polystyrene bead construct within a mold assembly, said mold assembly including a female half mold having a first, continuous, peripheral edge surface and an interior surface configured to impart a desired exterior surface to the construct, a male half mold having a second, peripheral edge surface in mating alignment with the first peripheral edge surface when the female half mold and the male half mold are aligned on an alignment axis, a first male mold insert mountable on the male half mold and havin...