Film in-mold injection mold device and molding method using the same
View Patent ↗A film in-mold injection mold device, including: a first mold that has an injection port configured to inject a molding material; and a second mold that is configured to face the first mold and has a sucking mechanism configured to suck a film to be supplied at a time of molding, wherein the second mold has a movable protruding part configured to touch, when the film is sucked, the film before the film touches an outer periphery edge part of a concave part which is formed on the second mold depending on a shape of an article to be molded, so as to temporarily ensure a space between the outer periphery edge part and the film.
1. A film in-mold injection mold device, comprising:
a first mold that has an injection port configured to inject a molding material; and
a second mold that is configured to face the first mold and has a sucking mechanism configured to suck a film to be supplied at a time of molding, wherein
the second mold has a movable protruding part configured to touch, when the film is sucked, the film before the film touches an outer periphery edge part of a concave part which is formed on the second mold depending on a shape of an article to be molded, so as to temporarily ensure a space between the outer periphery edge part and the film,
the movable protruding part is configured to be in a state of protruding from an abutting surface of the second mold or in a state of not protruding from the abutting surface, and
the space is temporarily ensured in the state where the movable protruding part protrudes most,
a film-touching part of the movable protruding part, which is configured to touch the film, is constituted with a curved surface,
the film-touching part of the movable protruding part is configured to be inclined, with reference to a mold clamping direction of the first or second mold, toward a side of a center of the concave part of the second mold,
the film-touching part is configured to be positioned, when the movable protruding part protrudes most from an abutting surface of the second mold, on a nearer side of the center of the concave part of the second mold with respect to the outer periphery edge part, and
a sucking drain is formed in an inner wall of a moving hole for movement of the movable protruding part.
2. A film in-mold injection mold device according to claim 1 , comprising a film clamp that is configured to press the film against an abutting surface of the second mold, wherein
a position of a portion of the film to be touched by the movable protruding part is on a nearer side of the concave part of the second mold with respect to a position of a portion of the film to be pressed by the film clamp.
3. A film in-mold injection mold device according to claim 1 , wherein
thermal conductivity of a material of the movable protruding part is greater than thermal conductivity of a material of the first or second mold, and
a temperature control circuit part configured to control temperature of the movable protruding part is provided within the movable protruding part.