Method for manufacturing plastic molded article and plastic molded article
AssigneeToyoda Gosei Co., Ltd.
InventorsShohei Yamamoto, Kazuki Takao, Hideto Maeda
Life of this patent
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Abstract
A method for manufacturing a plastic molded article includes producing a granular waste material by finely pulverizing a waste material that includes a base made of a thermoplastic and a decorative layer provided on a surface of the base, producing a molten waste material by melting the granular waste material, injecting the molten waste material into a cavity of a mold and maintaining the molten waste material in a molten state in the cavity, and molding the plastic molded article by cooling the molten waste material that is maintained in the molten state.
Claims8
A method for manufacturing a plastic molded article, the method comprising:
- producing a granular waste material by finely pulverizing a waste material that includes a base made of a thermoplastic and a decorative layer provided on a surface of the base;
- producing a molten waste material by melting the granular waste material;
- injecting the molten waste material into a cavity of a mold, wherein the mold has a molding surface for forming a decorative surface of the plastic molded article, and the mold is arranged such that the molding surface is positioned over the molten waste material in the cavity in a direction of gravity;
- maintaining the molten waste material in a molten state in the cavity for a predetermined time by maintaining a temperature in the cavity at a temperature at which solidification of the molten waste material can be avoided, wherein the predetermined time is a time sufficient for particles of the decorative layer contained in the molten waste material to precipitate in the cavity due to gravity;
- and
- molding the plastic molded article by cooling the molten waste material that is maintained in the molten state.
A method for manufacturing a plastic molded article, the method comprising:
- producing a granular waste material by finely pulverizing a waste material including a molded body made of a thermoplastic colored with a pigment;
- producing a molten waste material by melting the granular waste material;
- injecting the molten waste material into a cavity of a mold, wherein the mold has a molding surface for forming a decorative surface of the plastic molded article, and the mold is arranged such that the molding surface is positioned over the molten waste material in the cavity in a direction of gravity;
- maintaining the molten waste material in a molten state in the cavity for a predetermined time by maintaining a temperature in the cavity at a temperature at which solidification of the molten waste material can be avoided, wherein the predetermined time is a time sufficient for particles of the pigment contained in the molten waste material to precipitate in the cavity due to gravity;
- and
- molding the plastic molded article by cooling the molten waste material that is maintained in the molten state.
Dependencies are inferred from the claim text.