Method for manufacturing foam molded body
AssigneeKyoraku Co., Ltd.
InventorsYoshihiro YAMASAKI, Teruo TAMADA, Yu IGARASHI, Yuta MINAMIGAWA
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a foam molded body which can allow the foam resin sheet to follow the shape of the cavity of the mold with high accuracy even when the thickness of the foam resin sheet is thick. The method includes an arranging step to arrange one sheet of a foam resin sheet between first and second molds, the foam resin sheet being formed by extruding and dangling a molten foam resin from a slit; and an expanding step to expand the foam resin sheet by subjecting the foam resin sheet to a reduced pressure suction.
Claims18
A method for manufacturing a foam molded body, comprising the steps of:
- an arranging step to arrange one sheet of a foam resin sheet between a first mold and a second mold, the foam resin sheet being formed by extruding and dangling a molten foam resin from a slit;
- and
- an expanding step to expand the foam resin sheet by subjecting the foam resin sheet to a reduced pressure suction in a condition where the first mold and the second mold are closened to provide a gap between the first mold and the second mold, the gap having a thickness larger than a thickness of the foam resin sheet, thereby expanding the foam resin sheet to have the thickness of the gap.
A foam molded body comprising a central layer and skin layers provided on both sides of the central layer;
- wherein:
- the skin layer is a layer located from a surface of the foam molded body to 10% of the foam molded body in a thickness direction of the foam molded body, and the central layer is a layer located from 25 to 50% of the foam molded body in the thickness direction of the foam molded body from the surface;
- and
- an average bubble diameter of the central layer is larger than an average bubble diameter of the skin layer.
Dependencies are inferred from the claim text.