Two-color molding die, manufacturing method of two-color molded article, and imaging device including optical functional components
AssigneeOlympus Corporation
InventorMasaki OTSUKA
Life of this patent
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Abstract
A two-color molding die includes: a fixed primary die; a fixed secondary die; and a movable die. The fixed primary die includes a first concave portion. The movable die includes a second concave portion facing the first concave portion, and a core pin that protrudes from a base end surface of the second concave portion toward a base end surface of the first concave portion to form a tubular primary molding cavity between the core pin and the first concave portion and the second concave portion. The fixed secondary die includes a third concave portion configured to form a concave secondary molding cavity.
Claims7
A two-color molding die comprising:
- a fixed primary die;
- a fixed secondary die;
- and
- a movable die, wherein
- the fixed primary die includes a first concave portion,
- the movable die includes
- a second concave portion facing the first concave portion, and
- a core pin that protrudes from a base end surface of the second concave portion toward a base end surface of the first concave portion to form a tubular primary molding cavity between the core pin and the first concave portion and the second concave portion,
- when the movable die is closed with respect to the fixed primary die, a colored primary molding resin is filled into the primary molding cavity to form a tubular primary molded article,
- when the movable die is opened with respect to the fixed primary die after forming the primary molded article, the core pin is configured to hold the primary molded article that has been released from the fixed primary die,
- the fixed secondary die includes
- a third concave portion configured to form a concave secondary molding cavity in which a distal end portion of the primary molded article and the core pin that includes an apical surface protruding from an open end of the primary molded article are covered by the third concave portion when the movable die in which the primary molded article is held is closed with respect to the fixed secondary die, the secondary molding cavity being formed between the third concave portion and the distal end portion of the primary molded article and the core pin, the distal end portion of the primary molded article including the open end of the primary molded article, and
- when the movable die is closed with respect to the fixed secondary die, a secondary molding resin that is of transparent color is filled into the secondary molding cavity to form a secondary moldable article in which an optical functional surface is transferred due to the apical surface of the core pin.
A manufacturing method of a two-color molded article using a two-color molding die that includes a fixed primary die, a fixed secondary die, and a movable die, the method comprising:
- closing the movable die with respect to the fixed primary die;
- filing a colored primary molding resin into a tubular primary molding cavity to form a tubular primary molded article, the primary molding cavity being formed between a first concave portion of the fixed primary die and a second concave portion and a core pin of the movable die;
- closing the movable die in which the primary molded article is held by the core pin with respect to the fixed secondary die;
- and
- filling a secondary molding resin that is of transparent color into a concave secondary molding cavity to form a secondary molded article in which an optical functional surface is transferred due to an apical surface of the core pin protruding from an open end of the primary molded article, the concave secondary molding cavity being formed between a third concave portion of the fixed secondary die and a distal end portion of the primary molded article and the core pin, the distal end portion of the primary molded article including the open end of the primary molded article.
An imaging device comprising an optical functional component including a secondary molded article in which a tubular portion of a primary molded article that has been formed by a non-optical functional resin is covered by an optical functional resin, the optical functional component including an optical functional area formed from an optical functional surface at distal end side of the tubular portion to an outer surface of the secondary molded article, wherein
- a thickness of a distal end of the tubular portion is equal to or greater than one time of a distance between a distal end of an inner radius portion of the tubular portion and an inside effective diameter of the optical functional surface.
Dependencies are inferred from the claim text.