Multilayer molding apparatus and multilayer molding method

摘要

A multilayer molded product is formed by a multilayer molding apparatus including: a plurality of injection units on the part of a fixed platen; a moving platen caused to open and close the molds by a mold clamping unit; and a rotary platen mounted with different mold cavities on its surfaces facing the fixed platen and the moving platen respectively and having a mechanism enabling to move between the fixed platen and the moving platen in a mold opening/closing direction in conjunction with a mold opening/closing operation, stop at an arbitrary position, and rotate. The multilayer molded product is formed according to a multilayer molding method of switching the cavity to be formed by a mold core mounted on the fixed platen and a mold cavity mounted on the rotary platen by rotating the rotary platen, and performing injection-filling into the respective cavities from the plurality of injection units in accordance with preset injection patterns.

主权项

1. A multilayer molding apparatus, comprising:
a fixed platen mounted with a mold core; a moving platen mounted with a dummy plate on its surface facing the mold core, and movable with respect to the fixed platen in a mold opening/closing direction; a rotary platen provided between the fixed platen and the moving platen, movable with respect to the fixed platen and the moving platen in the mold opening/closing direction, rotatable about an axis extending perpendicular to the mold opening/closing direction, having at least a surface facing the mold core at a first position of rotation and a surface facing the mold core at a second position of rotation, and mounted with a first mold cavity on the surface facing the mold core at the first position of rotation and with a second mold cavity on the surface facing the mold core at the second position of rotation; a first injection unit provided on the part of the fixed platen connectably to the mold core, and configured to injection-fill a melt resin in a first cavity formed when the mold core and the first mold cavity are clamped against each other; a second injection unit provided on the part of the fixed platen connectably to the mold core, and configured to injection-fill a melt resin in a second cavity formed when the mold core and the second mold cavity are clamped against each other; a mold clamping unit configured to move the moving platen with respect to the fixed platen in the mold opening/closing direction; a rotary platen moving unit configured to move the rotary platen with respect to the fixed platen in the mold opening/closing direction; and a rotary platen coupling mechanism configured to be capable of coupling and integrating the moving platen and the rotary platen, wherein the rotary platen and the moving platen are configured to be integrally movable in the mold opening/closing direction by being coupled by the rotary platen coupling mechanism, wherein the mold clamping unit is a toggle-type mold clamping unit, and wherein the multilayer molding apparatus is configured to be capable of performing: a control for, in a state where the moving platen and the rotary platen are coupled by the rotary platen coupling mechanism, integrally moving the rotary platen and the moving platen in the mold opening/closing direction by the toggle-type clamping unit; and a control for, in a state where the moving platen and the rotary platen are not coupled by the rotary platen coupling mechanism, moving the moving platen in the mold opening/closing direction by the toggle-type mold clamping unit, and simultaneously or after moving the moving platen, moving the rotary platen in the mold opening/closing direction by the rotary platen moving unit.